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Reindeer Temporal range: Pleistocene 620,000 BP to present
Conservation status
Vulnerable (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Family:	Cervidae
Subfamily:	Capreolinae
Tribe:	Odocoileini
Genus:	Rangifer C.H. Smith, 1827
Species:	R. tarandus
Binomial name
Rangifer tarandus (Linnaeus, 1758)
Reindeer habitat divided into North American and Eurasian parts
Synonyms
Cervus tarandus (Linnaeus, 1758)

The reindeer (Rangifer tarandus), also known as caribou in North America, is a species of deer with circumpolar distribution, native to arctic, subarctic, tundra, boreal, and mountainous regions of northern Europe, Siberia, and North America. This includes both sedentary and migratory populations.

While overall widespread and numerous, some of its subspecies are rare and at least one has already become extinct. For this reason, it is considered to be vulnerable by the IUCN.

Reindeer vary considerably in colour and size. Both sexes can grow antlers annually, although the proportion of females that grow antlers varies greatly between population and season. Antlers are typically larger on males.

Hunting of wild reindeer and herding of semi-domesticated reindeer (for meat, hides, antlers, milk and transportation) are important to several Arctic and Subarctic peoples. In Lapland, reindeer pull pulks.

In traditional festive legend, Santa Claus's reindeer pull a sleigh through the night sky to help Santa Claus deliver gifts to children on Christmas Eve.

Etymology

Rangifer tarandus

The name Rangifer, which Carl Linnaeus chose for the reindeer genus, was used by Albertus Magnus in his De animalibus, fol. Liber 22, Cap. 268: "Dicitur Rangyfer quasi ramifer". This word may go back to a Saami word raingo. For the origin of the word tarandus, which Linnaeus chose as the specific epithet, he made reference to Ulisse Aldrovandi's Quadrupedum omnium bisulcorum historia fol. 859–863, Cap. 30: De Tarando (1621). However, Aldrovandi – and before him Konrad Gesner – thought that rangifer and tarandus were two separate animals. In any case, the tarandos name goes back to Aristotle and Theophrastus – see 'In history' below.

Reindeer

The name rein (-deer) is of Norse origin (Old Norse hreinn, which again goes back to Proto-Germanic *hrainaz and Proto-Indo-European *kroinos meaning "horned animal").

The word deer was originally broader in meaning, but became more specific over time. In Middle English, der (Old English dēor) meant a wild animal of any kind. This was in contrast to cattle, which then meant any sort of domestic livestock that was easy to collect and remove from the land, from the idea of personal-property ownership (rather than real estate property) and related to modern chattel (property) and capital. Cognates of Old English dēor in other dead Germanic languages have the general sense of animal, such as Old High German tior, Old Norse djúr or dýr, Gothic dius, Old Saxon dier, and Old Frisian diar.

Caribou

The name caribou comes, through French, from Mi'kmaq qalipu, meaning "snow shoveler", referring to its habit of pawing through the snow for food.

Other local variants

Because of its importance to many cultures, Rangifer tarandus and some of its subspecies have names in many languages. In the Uralic languages, Sami *poatsoj (in Northern Sami boazu, in Lule Sami boatsoj, in Pite Sami båtsoj, in Southern Sami bovtse, in Inari Sami puásui), Meadow Mari pücö and Udmurt pudžej, all referring to domesticated reindeer, go back to *pocaw, an Iranian loan word deriving from Proto-Indo-European *peḱu-, meaning "cattle". The Finnish name poro may also stem from the same.

With its range across North America and depth of history, Rangifer tarandus has countless aboriginal names. In Inuktitut, spoken in eastern Arctic North America, the caribou is known by the name tuktu. In the western North American Arctic, the term used by the Iñupiat is tuttu, or tutu. The Gwich’in people have over two dozen distinct caribou-related words.

Names for Rangifer tarandus in North American indigenous languages

caribou	syllabics or	meaning	language	people	region	R. t. subspecies and ecotype	language family
qalipu		one who paws	Mi'kmaq	Mi'kmaq	what is now Eastern Canada and U.S.	R. t. caribou	Algonquian
atíhko		caribou	Woods Cree	Cree	Northern Manitoba	R t groenlandicus	Algonquian
atihkw				Cree-Montagnais-Naskapi	region	R. t. caribou	Algonquian
bedzeyh			Koyukon language	Koyukon	Alaska (Western Arctic caribou herd)	R. t. granti	Athabaskan
vadzaih		caribou	Gwich’in language	Gwich’in	Northwest Territories (Porcupine River)	R. t. granti, Blue Nose herd, R.t. caribou	Athabaskan
wëdzey			Hän language	Hän			Athabaskan
tuktu			Inuktitut	Inuit	Nunavut (barren-ground) and Labrador	R. t. groenlandicus	Eskimo–Aleut
tuttu			Inupiaq language	Inupiat people	Alaska	R. t. granti (Western Arctic caribou herd)	Eskimo–Aleut
tuntu			Yup'ik	Yup'ik	Alaska (Western Arctic caribou herd)	R. t. granti	Eskimo–Aleut

Taxonomy and evolution

The species taxonomic name Rangifer tarandus was defined by Carl Linnaeus in 1758. The subspecies taxonomic name, Rangifer tarandus caribou was defined by Gmelin in 1788.

Based on Banfield's often-cited A Revision of the Reindeer and Caribou, Genus Rangifer (1961), R. t. caboti (Labrador caribou), R. t. osborni (Osborn's caribou—from British Columbia) and R. t. terraenovae (Newfoundland caribou) were considered invalid and included in R. t. caribou.

Some recent authorities have considered them all valid, even suggesting that they are quite distinct. In their book entitled Mammal Species of the World, American zoologist Don E. Wilson and DeeAnn Reeder agree with Valerius Geist, specialist on large North American mammals, that this range actually includes several subspecies.

Geist (2007) argued that the "true woodland caribou, the uniformly dark, small-maned type with the frontally emphasized, flat-beamed antlers", which is "scattered thinly along the southern rim of North American caribou distribution" has been incorrectly classified. He affirms that "true woodland caribou is very rare, in very great difficulties and requires the most urgent of attention."

In 2005, an analysis of mtDNA found differences between the caribou from Newfoundland, Labrador, south-western Canada and south-eastern Canada, but maintained all in R. t caribou.

Mallory and Hillis argued that, "Although the taxonomic designations reflect evolutionary events, they do not appear to reflect current ecological conditions. In numerous instances, populations of the same subspecies have evolved different demographic and behavioural adaptations, while populations from separate subspecies have evolved similar demographic and behavioural patterns... "[U]nderstanding ecotype in relation to existing ecological constraints and releases may be more important than the taxonomic relationships between populations."

Current classifications of Rangifer tarandus, either with prevailing taxonomy on subspecies, designations based on ecotypes, and natural population groupings, fail to capture "the variability of caribou across their range in Canada" needed for effective species conservation and management. "Across the range of a species, individuals may display considerable morphological, genetic, and behavioural variability reflective of both plasticity and adaptation to local environments." COSEWIC developed Designated Unit (DU) attribution to add to classifications already in use.

Subspecies

The canonical Mammal Species of the World (3rd ed.) recognizes fourteen subspecies, two of which are extinct.

subspecies of Rangifer tarandus

subspecies	name	migratory	division	range	weight of male
R. t. buskensis (1915)			woodland	Russia and neighbouring regions	no data
R. t. caboti** (G. M. Allen, 1914)	Labrador caribou
R. t. caribou (Gmelin, 1788)	Woodland caribou – woodland caribou, includes migratory woodland caribou	sedentary	boreal forest	south Canada and northwest U.S. mainland	largest
R. t. granti	Porcupine caribou, Grant's caribou	migratory	tundra	Alaska, United States, and Yukon, Canada
R. t. fennicus (Lönnberg, 1909)	Finnish forest reindeer		woodland	northwest Russia, and Finland	150–250 kg (330–550 lb)
R. t. groenlandicus (Borowski, 1780)	Barren-ground caribou	migratory	tundra	Nunavut and Northwest Territories, Canada, and western Greenland	150 kg (330 lb)
R. tarandus osborni** (J. A. Allen, 1902)	Osborn's caribou			British Columbia, Canada	no data
R. t. pearsoni (Lydekker, 1903)	Novaya Zemlya reindeer		island subspecies make local movements	Novaya Zemlya, Russia	no data
R. t. pearyi (J. A. Allen, 1902)	Peary caribou		island subspecies make local movements	high arctic islands of Nunavut and Northwest Territories, Canada	smallest in North America
R. t. phylarchus (Hollister, 1912)	Kamchatka reindeer		woodland	Kamchatka Peninsula and regions bordering the Sea of Okhotsk, Russia	no data
R. t. platyrhynchus (Vrolik, 1829)	Svalbard reindeer		island subspecies make local movements	Svalbard islands of Norway	smallest subspecies
R. t. sibiricus (Murray, 1866)	Siberian tundra reindeer			Siberia, Russia	no data
R. t. tarandus (Linnaeus, 1758) – caribou	Mountain reindeer – caribou		tundra or mountain	Arctic tundra of Fennoscandia peninsula in Norway	no data
R. t. terraenovae** (Bangs, 1896)	Newfoundland caribou
R. t. valentinae**	Forest reindeer			Ural Mountains, Russia, and Altai Mountains, Mongolia	no data

Extinct subspecies of Rangifer tarandus

subspecies	name	migratory	tundra	range	height of male	extinct since
R. t. dawsoni (Thompson-Seton, 1900)	†Queen Charlotte Islands caribou	extinct	no	Queen Charlotte Islands	no data	1910
R. t. eogroenlandicus	†Arctic reindeer	extinct	no	eastern Greenland	no data	1900

The table above includes R. tarandus caboti (Labrador caribou), R. tarandus osborni (Osborn's caribou – from British Columbia) and R. tarandus terraenovae (Newfoundland caribou). Based on a review in 1961, these were considered invalid and included in R. tarandus caribou, but some recent authorities have considered them all valid, even suggesting that they are quite distinct. An analysis of mtDNA in 2005 found differences between the caribous from Newfoundland, Labrador, south-western Canada and south-eastern Canada, but maintained all in R. tarandus caribou.

There are seven subspecies of reindeer of which only two are found in Fennoscandia: Eurasian tundra (or mountain) reindeer (R. t. tarandus) in Norway, Sweden, Finland and Russia and Eurasian forest reindeer R. t. fennicus in Finland and Russia.

Two subspecies are found only in North America: the Porcupine caribou and Peary caribou. Barren-ground caribou are found in western Greenland, but the larger herds are in Alaska, the Northwest Territories and Nunavut.

Grubb (2005) noted that subspecies and divisions below** are considered valid based on Banfield (1961) and considerably modified by Geist (1998):

Woodland caribou division:

• R. t. buskensis
• R. t. dawsoni
• R. t. fennicus
• R. t. phylarchus
• R. t. valentinae

Populations transitional between caribou and tarandus divisions includes osborni.

Tarandus division, barren-ground caribou or reindeer

• R. t. caboti (G.M. Allen, 1914)
• R. t. groenlandicus
• R. t. pearsoni
• R. t. sibiricus
• R. t. terraenovae

Platyrhynchus division

• R. t. pearyi or Peary caribou
• R. t. platyrhynchus or Svalbard reindeer

Some of the Rangifer tarandus subspecies may be further divided by ecotype depending on several behavioural factors – predominant habitat use (northern, tundra, mountain, forest, boreal forest, forest-dwelling, woodland, woodland (mountain), woodland (boreal), woodland (migratory), spacing (dispersed or aggregated), and migration (sedentary or migratory).

The "glacial-interglacial cycles of the upper Pleistocene had a major influence on the evolution" of Rangifer tarandus and other Arctic and sub-Arctic species. Isolation of Rangifer tarandus in refugia during the last glacial – the Wisconsin in North America and the Weichselian in Eurasia-shaped "intraspecific genetic variability" particularly between the North American and Eurasian parts of the Arctic.

In 1986 Kurtén reported that the oldest reindeer fossil was an "antler of tundra reindeer type from the sands of Süssenborn" in the Pleistocene (Günz) period (680,000 to 620,000 BP). By the 4-Würm period (110-70,000 to 12–10,000) its European range was very extensive. Reindeer occurred in

... Spain, Italy and southern Russia. Reindeer [was] particularly abundant in the Magdalenian deposits from the late part of the 4-Wurm just before the end of the Ice Age: at that time and at the early Mesolithic it was the game animal for many tribes. The supply began to get low during the Mesolithic, when reindeers retired to the north.

— Kurtén 1968:170

"In spite of the great variation, all the Pleistocene and living reindeer belong to the same species."

Humans started hunting reindeer in the Mesolithic and Neolithic periods, and humans are today the main predator in many areas. Norway and Greenland have unbroken traditions of hunting wild reindeer from the last glacial period until the present day. In the non-forested mountains of central Norway, such as Jotunheimen, it is still possible to find remains of stone-built trapping pits, guiding fences, and bow rests, built especially for hunting reindeer. These can, with some certainty, be dated to the Migration Period, although it is not unlikely that they have been in use since the Stone Age.

Physical characteristics

Antlers

Reindeer losing the velvet layer under which a new antler is growing, an annual process

In most populations both sexes grow antlers; the reindeer is the only cervid species in which females grow them as well as males.

In the Scandinavian populations, old males' antlers fall off in December, young males' fall off in the early spring, and females' fall off in the summer. The antlers typically have two separate groups of points, lower and upper. The antler's main beam begins at the brow "extending posterior over the shoulders and bowing so that the tips point forwards. The prominent, palmate brow tines extend forward, over the face."

There is considerable variation between subspecies in the size of the antlers (e.g. they are rather small and spindly in the northernmost subspecies), but on average the bull reindeer's antlers are the second largest of any extant deer, after the moose. In the largest subspecies, the antlers of large males can range up to 100 cm (39 in) in width and 135 cm (53 in) in beam length. They have the largest antlers relative to body size among living deer species.

Male reindeer used their antlers to compete with other males during the mating season. "During the rut, males engage in frequent and furious sparring battles with their antlers. Large males with large antlers do most of the mating." The velvet that covers growing antlers is a highly vascularised skin. When the antler growth is fully grown and hardened, the velvet is shed or rubbed off. Reindeer continue to migrate until the bull reindeer has spent the back fat (IOHP 065). After the mating season, the male reindeer shed his antlers, growing a new pair the next summer with a larger rack than the previous year. As the antler grows it is covered in thick velvet, filled with blood vessels and spongy in texture. This velvet is dark brown on woodland or barren-ground caribou and slate grey on Peary caribou and the Dolphin-Union Caribou herd. Antlers grow very quickly every year on the males. Velvet lumps in March can develop into a rack measuring more than a metre in length (3 ft) by August.

...these antlers get detached every year… Young males lose the velvet from the antlers much more quickly than female caribou even though they are not fully mature. They start to work with their antlers just as soon as the velvet starts to fall off. The young males engage in fights with their antlers towards autumn… soon after the velvet had fallen off they will be red, as they start to get bleached their colour changes… When the velvet starts to fall off the antler is red because the antler is made from blood. The antler is the blood that has hardened, in fact the core of the antler is still bloody when the velvet starts to fall off, at least close to the base.

— Noah Piugaattuk of Igloolik (IOHP 037)

In late autumn or early winter after the rut, male reindeer lose their antlers. Female reindeer keep their antlers until they calve. Antlers begin to grow on male reindeer in March and on female reindeer in May or June. This process is called antlerogenesis. When bull reindeer shed their antlers in early to midwinter, the antlered female reindeer acquire the highest ranks in the feeding hierarchy, gaining access to the best forage areas. These cows are healthier than those without antlers. Calves whose mothers do not have antlers are more prone to disease and have significantly higher mortality. Females in good nutritional condition, for example, during a mild winter with good winter range quality, may grow new antlers earlier as antler growth requires high intake. Antler size measured in number of points reflects the nutritional status of the reindeer and climate variation of its environment. The number of points on male reindeer increased from birth to five-years of age and remained relatively constant from then on. "In male caribou, antler mass (but not the number of tines) varies in concert with body mass."

While antlers of bull woodland caribou are typically smaller than barren-ground caribou, they can be over one metre across. They are flattened, compact, and relatively dense. Geist describes them as frontally emphasized, flat-beamed antlers. Woodland caribou antlers are thicker and broader than those of the barren-ground caribou, and their legs and heads are longer. The antler velvet of the barren-ground caribou and woodland caribou are dark chocolate brown.

Quebec-Labrador bull caribou antlers can be significantly larger and wider than other woodland caribou. Central barren-ground bull caribou are perhaps the most diverse in configuration and can grow to be very high and wide. Mountain caribou are typically the most massive with the largest circumference measurements.

Pelt

The colour of the fur varies considerably, both between individuals and depending on season and subspecies. Northern populations, which usually are relatively small, are whiter, while southern populations, which typically are relatively large, are darker. This can be seen well in North America, where the northernmost subspecies, the Peary caribou, is the whitest and smallest subspecies of the continent, while the southernmost subspecies, the woodland caribou, is the darkest and largest.

The coat has two layers of fur: a dense woolly undercoat and longer-haired overcoat consisting of hollow, air-filled hairs. Fur is the primary insulation factor that allows reindeer to regulate their core body temperature in relation to their environment, the thermogradient, even if the temperature rises to 100 °F (38 °C). In 1913 Dugmore noted how the woodland caribou swim so high out of the water, unlike any other mammal, because their hollow, "air-filled, quill-like hair" acts as a supporting "life jacket."

Heat exchange

Blood moving into the legs is cooled by blood returning to the body in a countercurrent heat exchange (CCHE), a highly efficient means of minimizing heat loss through the skin's surface. In the CCHE mechanism, in cold weather, blood vessels are closely knotted and intertwined with arteries to the skin and appendages that carry warm blood with veins returning to the body that carry cold blood causing the warm arterial blood to exchange heat with the cold venous blood. In this way, their legs for example are kept cool, maintaining the core body temperature nearly 30 °C (54 °F) higher with less heat lost to the environment. Heat is recycled instead of being dissipated. The "heart does not have to pump blood as rapidly in order to maintain a constant body core temperature and thus, metabolic rate." CCHE is present in animals like reindeer, fox and moose living in extreme conditions of cold or hot weather as a mechanism for retaining the heat in (or out of) the body. These are countercurrent exchange systems with the same fluid, usually blood, in a circuit, used for both directions of flow.

Reindeer have specialised counter-current vascular heat exchange in their nasal passages. Temperature gradient along the nasal mucosa is under physiological control. Incoming cold air is warmed by body heat before entering the lungs, and water is condensed from the expired air and captured before the reindeer's breath is exhaled, used to moisten dry incoming air and possibly absorbed into the blood through the mucous membranes. Like moose, caribou have specialised noses featuring nasal turbinate bones that dramatically increase the surface area within the nostrils.

Hooves

The reindeer has large feet with crescent-shaped, cloven hooves for walking in snow or swamps. According to the Species at Risk Public Registry (SARA), woodland,

"Caribou have large feet with four toes. In addition to two small ones, called "dew claws," they have two large, crescent-shaped toes that support most of their weight and serve as shovels when digging for food under snow. These large concave hooves offer stable support on wet, soggy ground and on crusty snow. The pads of the hoof change from a thick, fleshy shape in the summer to become hard and thin in the winter months, reducing the animal’s exposure to the cold ground. Additional winter protection comes from the long hair between the "toes"; it covers the pads so the caribou walks only on the horny rim of the hooves."

— SARA 2014

Reindeer hooves adapt to the season: in the summer, when the tundra is soft and wet, the footpads become sponge-like and provide extra traction. In the winter, the pads shrink and tighten, exposing the rim of the hoof, which cuts into the ice and crusted snow to keep it from slipping. This also enables them to dig down (an activity known as "cratering") through the snow to their favorite food, a lichen known as reindeer moss.

Size

Skull

The females usually measure 162–205 cm (64–81 in) in length and weigh 80–120 kg (180–260 lb). The males (or "bulls") are typically larger (to an extent which varies between the different subspecies), measuring 180–214 cm (71–84 in) in length and usually weighing 159–182 kg (351–401 lb). Exceptionally large males have weighed as much as 318 kg (701 lb). Weight varies drastically seasonally with males losing as much as 40% of their pre-rut weight.

Shoulder height is typically 85 to 150 cm (33 to 59 in), and the tail is 14 to 20 cm (5.5 to 7.9 in) long.

The reindeer from Svalbard are the smallest. They are also relatively short-legged and may have a shoulder height of as little as 80 cm (31 in), thereby following Allen's rule.

Clicking sound

The knees of many species of reindeer are adapted to produce a clicking sound as they walk. The sounds originate in the tendons of the knees and may be audible from ten meters away. The frequency of the knee-clicks is one of a range of signals that establish relative positions on a dominance scale among reindeer. "Specifically, loud knee-clicking is discovered to be an honest signal of body size, providing an exceptional example of the potential for non-vocal acoustic communication in mammals." The clicking sound made by reindeer as they walk is caused by small tendons slipping over bone protuberances (sesamoid bones) in their feet. The sound is made when a reindeer is walking or running, occurring when the full weight of the foot is on the ground or just after it is relieved of the weight.

Eyes

A study by researchers from University College London in 2011 revealed that reindeer can see light with wavelengths as short as 320 nm (i.e. in the ultraviolet range), considerably below the human threshold of 400 nm. It is thought that this ability helps them to survive in the Arctic, because many objects that blend into the landscape in light visible to humans, such as urine and fur, produce sharp contrasts in ultraviolet. A study at the University of Tromsø has confirmed that "Arctic reindeer eyes change in colour through the seasons from gold through to blue to help them better detect predators...".

Biology and behaviour

Diet

Caribou licking salt from roadway in British Columbia

Reindeer are ruminants, having a four-chambered stomach. They mainly eat lichens in winter, especially reindeer lichen – a unique adaptation among mammals – and are the "only large mammal able to metabolize lichen owing to specialized bacteria and protozoa in their gut.". They are the only animals except for some gastropods in which the enzyme lichenase, which breaks down lichenin to glucose, has been found. However, they also eat the leaves of willows and birches, as well as sedges and grasses. They have been known to eat their own fallen antlers, probably for calcium. There is some evidence to suggest that on occasion, especially in the spring when they are nutritionally stressed, they will also feed on small rodents such as lemmings, fish such as Arctic char, and bird eggs. Reindeer herded by the Chukchis have been known to devour mushrooms enthusiastically in late summer.

Seasonal body composition

Swedish reindeer

Reindeer have developed adaptations for optimal metabolic efficiency during warm months as well as for during cold months. The body composition of reindeer varies highly with the seasons. Of particular interest is the body composition and diet of breeding and non-breeding females between seasons. Breeding females have more body mass than non-breeding females between the months of March and September with a difference of around 10 kg more than non-breeding females. From November to December, non-breeding females have more body mass than breeding females as non-breeding females were able to focus their energies towards storage during colder months rather than lactation and reproduction. Body masses of both breeding and non-breeding females peaked in September. During the months of March through April, breeding females have more fat mass than the nonbreeding females with a difference of almost 3 kg. After this however, nonbreeding females on average have a higher fat mass than the breeding females.

The environmental variations play a large part in reindeer nutrition, as winter nutrition is crucial to adult and neonatal survival rates. Lichens are a staple during the winter months as they’re a readily available food source, which reduces the reliance on stored body reserves. Lichens are a crucial part of the reindeer diet, however they are less prevalent in the diet of pregnant reindeer compared to non-pregnant individuals. The amount of lichen in a diet is found more in non-pregnant adult diets than pregnant individuals due to the lack of nutritional value. Although lichens are high in carbohydrates, they are lacking in essential proteins that vascular plants provide. The amount of lichen in a diet decreases in latitude that results in nutritional stress being higher in areas with low lichen abundance.

Reproduction and life-cycle

Further information: Rut (mammalian reproduction) § Cervidae

Reindeer mate in late September to early November, and the gestation period is about 228–234 days. During the mating season, males battle for access to females. Two males will lock each other's antlers together and try to push each other away. The most dominant males can collect as many as 15–20 females to mate with. A male will stop eating during this time and lose much of his body reserves.

To calve, "females travel to isolated, relatively predator-free areas such as islands in lakes, peatlands, lakeshores, or tundra." As females select the habitat for the birth of their calves, they are more wary than males. Dugmore noted that in their seasonal migrations the herd follows a doe for that reason. Newborns weigh on average 6 kg (13 lb). In May or June the calves are born. After 45 days, the calves are able to graze and forage but continue suckling until the following autumn when they become independent from their mothers.

Males live 4 years less than the females whose maximum longevity is about 17 years. Females with a normal body size who have had sufficient summer nutrition, can begin breeding anytime between the ages of one to three years. When a female has undergone nutritional stress, it is possible for her to not reproduce for the year. Dominant males, those with larger body size and antler racks, inseminate more than one doe a season.}

Social structure, migration and range

The size of the antlers plays a significant role in establishing the hierarchy in the group.

Some populations of the North American caribou, for example many herds in the subspecies barren-ground caribou and some woodland caribou in Ungava and Labrador, migrate the farthest of any terrestrial mammal, travelling up to 5,000 km (3,000 mi) a year, and covering 1,000,000 km² (400,000 sq mi). Other North American populations, the woodland caribou (boreal) for example, are largely sedentary. In Europe populations have a shorter migration. Island herds such as the subspecies R. t. pearsoni and R. t. platyrhynchus make local movements. Migrating reindeer can be negatively affected by parasite loads. Severely infected individuals are weak and probably have shortened lifespans, but parasite levels vary between populations. Infections create an effect known as culling: infected migrating animals are less likely to complete the migration.

Normally travelling about 19–55 km (12–34 mi) a day while migrating, the caribou can run at speeds of 60–80 km/h (37–50 mph). Young caribou can already outrun an Olympic sprinter when only a day old. During the spring migration smaller herds will group together to form larger herds of 50,000 to 500,000 animals, but during autumn migrations the groups become smaller, and the reindeer begin to mate. During winter, reindeer travel to forested areas to forage under the snow. By spring, groups leave their winter grounds to go to the calving grounds. A reindeer can swim easily and quickly, normally at about 6.5 km/h (4 mph) but if necessary at 10 km/h (6 mph), and migrating herds will not hesitate to swim across a large lake or broad river.

As an adaptation to their Arctic environment, they have lost their circadian rhythm.

Ecology

Distribution and habitat

Originally, the reindeer was found in Scandinavia, eastern Europe, Greenland, Russia, Mongolia, and northern China north of the 50th latitude. In North America, it was found in Canada, Alaska, and the northern conterminous USA from Washington to Maine. In the 19th century, it was apparently still present in southern Idaho. Even in historical times, it probably occurred naturally in Ireland. During the late Pleistocene era, reindeer occurred as far south as Nevada and Tennessee in North America, and as far south as Spain in Europe. Today, wild reindeer have disappeared from these areas, especially from the southern parts, where it vanished almost everywhere. Large populations of wild reindeer are still found in Norway, Finland, Siberia, Greenland, Alaska, and Canada.

According to the Grubb (2005), Rangifer tarandus is "circumboreal in the tundra and taiga" from "Svalbard, Norway, Finland, Russia, Alaska (USA) and Canada including most Arctic islands, and Greenland, south to northern Mongolia, China (Inner Mongolia; now only domesticated or feral?), Sakhalin Island, and USA (Northern Idaho and the Great Lakes region). Reindeer were introduced to, and feral in, Iceland, Kerguelen Islands, South Georgia Island, Pribilof Islands, St. Matthew Island."

There is strong regional variation in Rangifer herd size. There are large population differences among individual herds, and the size of individual herds has varied greatly since 1970. The largest of all herds (Taimyr, Russia) has varied between 400,000 and 1,000,000; the second largest herd (George River, Canada) has varied between 28,000 and 385,000.

While Rangifer is a widespread and numerous genus in the northern Holarctic, being present in both tundra and taiga (boreal forest), by 2013, many herds had "unusually low numbers" and their winter ranges in particular were smaller than they used to be. Caribou and reindeer numbers have fluctuated historically, but many herds are in decline across their range. This global decline is linked to climate change for northern, migratory herds and industrial disturbance of habitat for non-migratory herds.

In November 2016, it was reported that more than 81,000 reindeer in Russia had died as a result of climate change. Longer autumns leading to increased amounts of freezing rain created a few inches of ice over lichen, starving many reindeer.

Predators

Reindeer standing on snow to avoid blood-sucking insects.

A variety of predators prey heavily on reindeer, including over-hunting by people in some areas, which contributes to the decline of populations.

Golden eagles prey on calves and are the most prolific hunter on calving grounds. Wolverines will take newborn calves or birthing cows, as well as (less commonly) infirm adults.

Brown bears and polar bears prey on reindeer of all ages, but like the wolverines they are most likely to attack weaker animals, such as calves and sick deer, since healthy adult reindeer can usually outpace a bear. The grey wolf is the most effective natural predator of adult reindeer and sometimes takes large numbers, especially during the winter. Some wolf packs as well as individual grizzly bears in Canada may follow and live off of a particular reindeer herd year round.

Additionally, as carrion, reindeer may be scavenged opportunistically by foxes, hawks and ravens.

Blood-sucking insects, such as mosquitoes (Culicidae), black flies (Simuliidae), oestrid flies (warble flies) Hypoderma tarandi and nose bot flies (Cephenemyia trompe), are a plague to reindeer during the summer and can cause enough stress to inhibit feeding and calving behaviours. An adult reindeer will lose perhaps about 1 liter (about 2 US pints) of blood to biting insects for every week it spends in the tundra. The population numbers of some of these predators is influenced by the migration of reindeer. Tormenting insects keep caribou on the move searching for windy areas like hilltops and mountain ridges, rock reefs, lakeshore and forest openings, or snow patches that offer respite from the buzzing horde. Gathering in large herds is another strategy caribou use to block insects.

In one case, the entire body of a reindeer was found in the stomach of a Greenland shark, a species found in the far northern Atlantic, although this was possibly a case of scavenging, considering the dissimilarity of habitats between the ungulate and the large, slow-moving fish.

Other threats

White-tailed deer (Odocoileus virginianus) commonly carry meningeal worm or brainworm, a nematode parasite that causes reindeer, moose (Alces alces), elk (Cervus canadensis), and mule deer (Odocoileus hemionus) to develop fatal neurological symptoms which include a loss of fear of humans. White-tailed deer that carry this worm are partly immune to it.

Changes in climate and habitat beginning in the twentieth century have expanded range overlap between white-tailed deer and caribou, increasing the frequency of infection within the reindeer population. This increase in infection is a concern for wildlife managers. Human activities, such as "clear-cutting forestry practices, forest fires, and the clearing for agriculture, roadways, railways, and power lines," favour the conversion of habitats into the preferred habitat of the white-tailed deer-"open forest interspersed with meadows, clearings, grasslands, and riparian flatlands."

By country

Russia

In 2013, the Taimyr herd in Russia was the largest herd in the world. In 2000, the herd increased to 1,000,000 but by 2009, there were 700,000 animals. In the 1950s, there were 110,000.

There are three large herds of migratory tundra wild reindeer in central Siberia's Yakutia region: Lena-Olenek, Yana-Indigirka and Sundrun herds. While the population of the Lena-Olenek herd is stable, the others are declining.

Further east again, the Chukotka herd is also in decline. In 1971, there were 587,000 animals. They recovered after a severe decline in 1986, to only 32,200 individuals, but their numbers fell again. According to Kolpashikov, by 2009 there were less than 70,000.

North America

Main article: Caribou (North America)

Approximate range of caribou subspecies in North America. Overlap is possible for contiguous range. 1.R. t. caribou subdivided into ecotypes: woodland (boreal), woodland (migratory), woodland (montane), 2.R. t. dawsoni extinct 1907, 3. R. t. granti, 4.R. t. groenlandicus, 5. R. t. groenlandicus/pearyi 6. R. t. pearyi

There are four living subspecies of R. tarandus, locally known in North America as caribou: R. t. granti (Porcupine caribou), R. t. caribou subdivided into ecotypes: woodland (boreal), woodland (migratory), woodland (montane), R. t. groenlandicus and R. t. pearyi.

In North America, because of its vast range in a wide diversity of ecosystems, the subspecies Rangifer tarandus caribou is further distinguished by a number of ecotypes, including boreal woodland caribou, mountain woodland caribou and migratory woodland caribou). Populations—caribou that do not migrate—or herds—those that do migrate—may not fit into narrow ecotypes. For example, Banfield's 1961 classification of the migratory George River Caribou Herd, in the Ungava region of Quebec, as subspecies Rangifer tarandus caribou, woodland caribou, remains—although other woodland caribou are mainly sedentary.

Rangifer tarandus is "endangered in Canada in regions such as south-east British Columbia at the Canadian-USA border, along the Columbia, Kootenay and Kootenai rivers and around Kootenay Lake. Rangifer tarandus is endangered in the United States in Idaho and Washington. R. t. pearyi is on the IUCN endangered list." According to Geist, the "woodland caribou is highly endangered throughout its distribution right into Ontario."

United States

Although there are remnant populations of R. t. caribou boreal woodland caribou in the northern United States, most of U.S. caribou populations are in Alaska.

Alaska

Alaska has four herds in Alaska, the Western Arctic herd, Teshekpuk Lake herd, the Central Arctic herd and the Porcupine herd. The largest is the Western Arctic Caribou Herd but the smaller Porcupine caribou herd has the longest migration of any terrestrial mammal on earth with a vast historical range.

Porcupine caribou herd

Main article: Porcupine caribou

Male Porcupine caribou R. t. granti in Alaska

Migratory caribou herds are named after their birthing grounds, in this case the Porcupine River, which runs through a large part of the range of the Porcupine herd. Individual herds of migratory caribou once had over a million animals per herd, and could taking over ten days to cross the Yukon River, but these numbers dramatically declined with habitat disturbance and degradation. Though numbers fluctuate, the herd comprises approximately 169 000 animals (based on a July 2010 photocensus). The Porcupine herd's annual migrations of 1,500 miles (2,400 km) are among the longest of any terrestrial mammal. Their range spans approximately 260,000 km² (64,000,000 acres), from Dawson City, Yukon to Aklavik, NWT to Kaktovik, Alaska on the Beaufort Sea. The Porcupine caribou or Grant's caribou (Rangifer tarandus granti) is a subspecies with a vast range that includes northeastern Alaska and the Yukon, and is therefore cooperatively managed by government agencies and aboriginal peoples from both countries. The Gwich'in people, followed the Porcupine caribou herd—their primary source of food, tools, and clothing—for thousands of years—according to oral tradition, for as long as 20,000 years. They continued their nomadic lifestyle until the 1870s. This herd is also traditional food for the Inupiat, Inuvialuit, Hän, and Northern Tutchone. There is currently controversy over whether possible future oil drilling on the coastal plains of the Arctic National Wildlife Refuge, encompassing much of the Porcupine caribou calving grounds, will have a severe negative impact on the caribou population or whether the caribou population will grow.

Unlike many other Rangifer tarandus subspecies and their ecotypes, the Porcupine herd is stable at relatively high numbers, but the 2013 photo-census was not counted by January 2014. The peak population in 1989 of 178,000 animals was followed by a decline by 2001 to 123,000. However, by 2010, there was a recovery and an increase to 169,000 animals.

Many Gwich'in people, who depend on the Porcupine caribou, still follow traditional caribou management practices that include a 1981 prohibition against selling caribou meat and limits on the number of caribou to be taken per hunting trip.

Western Arctic Caribou herd

The Western Arctic Caribou Herd is the largest of the three. The Western Arctic herd reached a low of 75,000 in the mid-1970s. In 1997 the 90,000 WACH changed their migration and wintered on Seward Peninsula. Alaska's reindeer herding industry has been concentrated on Seward Peninsula ever since the first shipment of reindeer was imported from eastern Siberia in 1892 as part of the Reindeer Project, an initiative to replace whale meat in the diet of the indigenous people of the region. For many years it was believed that the geography of the peninsula would prevent migrating caribou from mingling with domesticated reindeer who might otherwise join caribou herds when they left an area. However, in 1997 the domesticated reindeer joined the Western Arctic Caribou Herd on their summer migration and disappeared. The WACH reached a peak of 490,000 in 2003 and then declined to 325,000 in 2011.

Teshekpuk Lake and Central Arctic herds

In 2008, the Teshekpuk Lake herd had 64,107 animals and the Central Arctic herd had 67,000.

Reindeer imported to Alaska

Reindeer were imported from Siberia in the late 19th century and from Norway in the early 1900s as semi-domesticated livestock in Alaska. Reindeer interbreed with native caribou subspecies.

Canada

Nunavut

The barren-ground caribou subspecies R. t. groenlandicus, a long-distance migrant, includes large herds in the Northwest Territories and in Nunavut, for example the Beverly, the Ahiak and Qamanirjuaq herds. In 1996, the population of the Ahiak herd was approximately 250,000 animals.

Ahiak, Beverly, Qamanirjuaq herds

The Ahiak, Beverly, Qamanirjuaq herds are barren-ground caribou.

The Beverly herd of barren-ground caribou, Thelon River, Nunavut.

"The Beverly herd’s crossing of the Thelon River to its traditional calving grounds near Beverly Lake was part of the lives of the Dene aboriginal people for 8000 years, as revealed by an unbroken archaeological record of deep layers of caribou bones and stone tools in the banks of the Thelon River (Gordon 2005)." The Beverly Herd (located primarily in Saskatchewan, Northwest Territories; portions in Nunavut, Manitoba, Alberta) and the Qamanirjuaq Herd (located primarily in Manitoba, Nunavut; portions in southeastern NWT, northeastern Saskatchewan) fall under the auspices of the Beverly and Qamanirjuaq Caribou Management Board. The Beverly herd, whose range spans the tundra from northern Manitoba and Saskatchewan and well into the Northwest Territories and Nunavut, had a peak population in 1994 of 276,000 or 294,000, but by 2011 there were approximately 124,000 caribou in the Beverly herd and 83,300 in the Ahiak herd. The calving grounds of the Beverly caribou herd are located around Queen Maud Gulf but the herd shifted its traditional birthing area. Caribou management agencies are concerned that deterioration and disturbance of habitat along with "parasites, predation and poor weather" are contributing to a cycling down of most caribou populations. It was suggested the Ahiak and Beverly herds switched calving grounds and the Beverly may have moved "near the western Queen Maud Gulf coast to the north of the herd’s "traditional" calving ground in the Gary Lakes area north of Baker Lake." The "Beverly herd may have declined (similar to other Northwest Territories herds), and cows switched to the neighbouring Ahiak herd to maintain the advantages of gregarious calving." By 2011 there were approximately 124,000 caribou in the combined Beverly/Ahiak herd which represents a "50% or a 75% decline from the 1994 population estimate for the Beverly Herd."

The barren-ground caribou population on Southampton Island, Nunavut declined by almost 75%, from about 30,000 caribou in 1997 to 7,800 caribou in 2011.

Peary caribou on Baffin Island

Main article: Peary caribou

The Peary caribou is a relatively small and pale subspecies found in the tundra of far northern North America. Unsurprisingly, it is part of the group known as tundra reindeer.

The R. t. pearyi (Peary caribou), the smallest subspecies in North America, known as Tuktu in Inuktitut, are found in the northern islands of Nunavut and the Northwest Territories. They remain at low numbers after severe declines. On Baffin Island, the largest Arctic island, the population of Peary caribou peaked in the early 1990s to approximately 60,000 to 180,000. By 2012, in northern Baffin Island caribou numbers were considered to be at a "low in the cycle after a high in the 1990s" and in south Baffin Island, the population was estimated as between 1,065 and 2,067.

Northwest Territories

There are four barren-ground caribou herds in the Northwest Territories—Cape Bathurst, Bluenose West, Bluenose East and Bathurst. The Bluenose East caribou herd began a recovery with a population of approximately 122,000 in 2010. which is being credited to the establishment of Tuktut Nogait National Park. According to T. Davison 2010, CARMA 2011, the three other herds "declined 84–93% from peak sizes in the mid-1980s and 1990s.

R. t. caribou

The subspecies R. t. caribou commonly known as woodland caribou, is divided into ecotypes: boreal woodland caribou (also known as forest-dwelling), woodland caribou (boreal), mountain woodland caribou, and migratory woodland caribou. Caribou are classified by ecotype depending on several behavioural factors – predominant habitat use (northern, tundra, mountain, forest, boreal forest, forest-dwelling), spacing (dispersed or aggregated) and migration (sedentary or migratory).

In Canada, the national meta-population of the sedentary boreal ecotype spans the boreal forest from the Northwest Territories to Labrador. They prefer lichen-rich mature forests and mainly live in marshes, bogs, lakes, and river regions. The historic range of the boreal woodland caribou covered over half of present-day Canada, stretching from Alaska to Newfoundland and Labrador and as far south as New England, Idaho, and Washington. Woodland caribou have disappeared from most of their original southern range. The boreal woodland was designated as threatened in 2002. In 2011 there were approximately 34,000 boreal caribou in 51 ranges remaining in Canada.

George River caribou herd (GRCH)

Main article: George River (Quebec)

The migratory George River caribou herd (GRCH), in the Ungava region of Quebec and Labrador in eastern Canada was once the world's largest herd with 800,000–900,000 animals. Although it is categorized as a subspecies Rangifer tarandus caribou, the woodland caribou, the GRCH is migratory woodland caribou and like the barren-ground caribou it's ecotype may be tundra caribou, Arctic, northern of migratory, not forest-dwelling and sedentary like most woodland caribou ecotypes. It is unlike most woodland caribou in that it is not sedentary. Since the mid-1990s, the herd declined sharply and by 2010, it was reduced to 74,131—a drop of up to 92%. A 2011 survey confirms a continuing decline of the George River migratory caribou herd population. By 2012 it was estimated to be about 27,600 animals, down from 385,000 in 2001 and 74,131 in 2010."

Leaf River caribou herd (LRCH)

Leaf River caribou

Caribou crossing Leaf River

Leaf River and caribou

The Leaf River caribou herd (LRCH), another migratory forest-tundra ecotype of the boreal woodland caribou, near the coast of Hudson Bay, increased from 270 000 individuals in 1991 to 628 000 in 2001. By 2011 the herd had decreased to 430 000 caribou. According to an international study on caribou populations, the George River and Leaf River herds, and other herds that migrate from Nunavik, Quebec and insular Newfoundland, could be threatened with extinction by 2080.

Queen Charlotte Islands caribou

The Queen Charlotte Islands caribou (R. tarandus dawsoni) from the Queen Charlotte Islands was believed to represent a distinct subspecies. It became extinct at the beginning of the 20th century. However, recent DNA analysis from mitochondrial DNA of the remains from those reindeer suggest that the animals from the Queen Charlotte Islands were not genetically distinct from the Canadian mainland reindeer subspecies.

Greenland

According to Kolpashikov et al. (2013) there were four main populations of wild R. t. groenlandicus, barren-ground caribou, in west Greenland in 2013. The Kangerlussuaq-Sisimiut caribou herd, the largest had a population of around 98,000 animals in 2007. The "second largest, Akia-Maniitsoq decreased from an estimated 46,000 in 2001 to about 17,400 in 2010. According to Cuyler, "one possible cause might be the topography, which prevents hunter access in the former while permitting access in the latter."

Norway

The last remaining wild tundra reindeer in Europe are found in portions of southern Norway. In southern Norway in the mountain ranges, there are about 30,000–35,000 reindeer with 23 different populations. The largest herd with about 10,000 individuals, is at Hardangervidda. By 2013 the greatest challenges to management were "loss of habitat and migration corridors to piecemeal infrastructure development and abandonment of reindeer habitat as a result of human activities and disturbance."

Norway is now preparing to apply for nomination as a World Heritage Site for areas with traces and traditions of reindeer hunting in Dovrefjell-Sunndalsfjella National Park, Reinheimen National Park and Rondane National Park in Central Sør-Norge (Southern Norway). There is in these parts of Norway an unbroken tradition of reindeer hunting from post-glacial Stone Age until today.

On 29 August 2016, the Norwegian Environment Agency announced the death of 323 reindeer by the effects of a lightning strike in Hardangervidda.

Svalbard reindeer

Main article: Svalbard reindeer

Characteristically small and relatively short-legged reindeer from Svalbard

The Svalbard reindeer subspecies R. t. platyrhynchus from Svalbard island is very small compared to other subspecies (a phenomenon known as insular dwarfism), with females having a length of approximately 150 cm (59 in), and a weight around 53 kg (117 lb) in the spring and 70 kg (150 lb) in the autumn. Males are approximately 160 cm (63 in) long, and weigh around 65 kg (143 lb) in the spring and 90 kg (200 lb) in the autumn. The reindeer from Svalbard are also relatively short-legged and may have a shoulder height of as little as 80 cm (31 in), thereby following Allen's rule.

Svalbard reindeer (R. t. platyrhynchus)

The Rangifer tarandus platyrhynchus subspecies, in Norway referred to as the Svalbard reindeer, seems to have evolved from large European reindeer. The Svalbard reindeer is special in several ways. Svalbard reindeer has peculiarities in its metabolism. The skeleton shows a remarkable relative shortening of the legs, thus parallelling many extinct insular deer species.

Finland

Main article: Finnish forest reindeer

The Finnish forest reindeer (R. tarandus fennicus), is found in the wild in only two areas of the Fennoscandia peninsula of Northern Europe, in Finnish/Russian Karelia, and a small population in central south Finland. The Karelia population reaches far into Russia, however, so far that it remains an open question whether reindeer further to the east are R. t. fennicus as well. By 2007 reindeer experts were concerned about the collapse of the wild Finnish forest reindeer (Rangifer tarandus fennicus) in the eastern province of Kainuu. During the peak year of 2001, the Finnish forest reindeer population in Kainuu was established at 1,700. In a March 2007 helicopter count, only 960 individuals were detected.

Iceland

East Iceland has a small herd of about 2500–3000 animals. Iceland (increasing or are stable at high numbers 2013) Iceland: Reindeer were introduced to Iceland (17) in the late 1700s cited in. The Icelandic reindeer population in July 2013 was estimated at approximately 6000. With a hunting quota of 1,229 animals, the winter 2013–2014 population is expected to be around 4800 reindeer

British overseas territory experiment

Southernmost reindeer: South Georgian reindeer with velvet-covered antlers

A few reindeer from Norway were introduced to the South Atlantic island of South Georgia in the beginning of the 20th century. The South Georgian reindeer total some 2,600 animals in two distinct herds separated by glaciers. Although the flag and the coat of arms of the territory contain an image of a reindeer, a decision was taken in 2011 to completely eradicate the animals from the island because of the environmental damage they cause.

French overseas territory experiment

Around 4000 reindeer have been introduced into the French sub-Antarctic archipelago of Kerguelen Islands.

Conservation

Current status

While overall widespread and numerous, some subspecies are rare and at least one has already gone extinct. As of 2015, the IUCN has classified the reindeer as Vulnerable due to an observed population decline of 40% over the last ~25 years. According to IUCN Rangifer tarandus as a species is not endangered because of its overall large population and the widespread range.

In North America subspecies R. t. dawsoni is extinct. R. t. pearyi is endangered, R. t. caribou are designated as threatened and some individual populations are endangered. While the subspecies R. t. granti and R. t. groenlandicus are not designated as threatened, many individual herds—including some of the largest—are declining and there is much concern at the local level.

Rangifer tarandus is "endangered in Canada in regions such as south-east British Columbia at the Canadian-USA border, along the Columbia, Kootenay and Kootenai rivers and around Kootenay Lake. Rangifer tarandus is endangered in the United States in Idaho and Washington.

There is strong regional variation in Rangifer herd size, By 2013 many caribou herds in North America had "unusually low numbers" and their winter ranges in particular were smaller than they used to be. Caribou numbers have fluctuated historically, but many herds are in decline across their range. There are many factors contributing to the decline in numbers.

Decline

Ongoing human development of reindeer habitat has caused populations of woodland caribou to disappear from their original southern range. In particular, caribou were extirpated in many areas of eastern North America in the beginning of the 20th century. Woodland caribou were designated as threatened in 2002. Environment Canada reported in 2011 that there were approximately 34,000 boreal caribou in 51 ranges remaining in Canada (Environment Canada, 2011b). Professor Marco Musiani of the University of Calgary, said in a statement that "The woodland caribou is already an endangered species in southern Canada and the United States....[The] warming of the planet means the disappearance of their critical habitat in these regions. Caribou need undisturbed lichen-rich environments and these types of habitats are disappearing."

Woodland caribou have disappeared from most of their original southern range and were designated as threatened in 2002 by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC). Environment Canada reported in 2011 that there were approximately 34 000 boreal caribou in 51 ranges remaining in Canada.(Environment Canada, 2011b). "According to Geist, the "woodland caribou is highly endangered throughout its distribution right into Ontario."

In 2002 the Atlantic-Gaspésie population of the woodland caribou was designated as endangered by COSEWIC. The small isolated population of 200 animals was at risk from predation and habitat loss.

In 1991 COSEWIC assigned "endangered status" to the Banks Island and High Arctic populations of Peary caribou. The Low Arctic population of Peary caribou was designated as threatened. By 2004 all three were designated as "endangered."

Numbers have declined by about 72% over the last three generations, mostly because of catastrophic die-off likely related to severe icing episodes. The ice covers the vegetation and caribou starve. Voluntary restrictions on hunting by local people are in place, but have not stopped population declines. Because of the continuing decline and expected changes in long-term weather patterns, this subspecies is at imminent risk of extinction.

— COSEWIC 2004

Relationship with humans

See also: Reindeer in Siberian Shamanism

Reindeer pulling a sled in Russia

See also: Reindeer hunting in Greenland

The reindeer has an important economic role for all circumpolar peoples, including the Saami, Nenets, Khants, Evenks, Yukaghirs, Chukchi, and Koryaks in Eurasia. It is believed that domestication started between the Bronze and Iron Ages. Siberian deer owners also use the reindeer to ride on (Siberian reindeer are larger than their Scandinavian relatives). For breeders, a single owner may own hundreds or even thousands of animals. The numbers of Russian herders have been drastically reduced since the fall of the Soviet Union. The sale of fur and meat is an important source of income. Reindeer were introduced into Alaska near the end of the 19th century; they interbreed with native caribou subspecies there. Reindeer herders on the Seward Peninsula have experienced significant losses to their herds from animals (such as wolves) following the wild caribou during their migrations.

Reindeer meat is popular in the Scandinavian countries. Reindeer meatballs are sold canned. Sautéed reindeer is the best-known dish in Lapland. In Alaska and Finland, reindeer sausage is sold in supermarkets and grocery stores. Reindeer meat is very tender and lean. It can be prepared fresh, but also dried, salted, hot- and cold-smoked. In addition to meat, almost all internal organs of reindeer can be eaten, some being traditional dishes. Furthermore, Lapin Poron liha, fresh reindeer meat completely produced and packed in Finnish Lapland, is protected in Europe with PDO classification.

Reindeer antler is powdered and sold as an aphrodisiac, nutritional or medicinal supplement to Asian markets.

The blood of the caribou was supposedly mixed with alcohol as drink by hunters and loggers in colonial Quebec to counter the cold. This drink is now enjoyed without the blood as a wine and whiskey drink known as Caribou.

Reindeer and indigenous peoples

Wild reindeer are still hunted in North America and Greenland. In the traditional lifestyle of the Inuit people, Northern First Nations people, Alaska Natives, and the Kalaallit of Greenland, the caribou is an important source of food, clothing, shelter, and tools. Many Gwich'in people, who depend on the Porcupine caribou, still follow traditional reindeer management practices that include a prohibition against selling reindeer meat and limits on the number of reindeer to be taken per hunting trip.

There is an Inuit saying from the Kivalliq region,

The caribou feeds the wolf, but it is the wolf who keeps the caribou strong.

— Kivalliq region

Elder Chief of Koyukuk and chair for the Western Arctic Caribou Herd Working Group, Benedict Jones or K’ughto’oodenool’o’ represents the Middle Yukon River, Alaska. His grandmother was a member of the Caribou Clan, who travelled with the reindeer as a means to survive. In 1939, they were living the traditional life style at one of their hunting camps in Koyukuk near the location of what is now the Koyukuk National Wildlife Refuge. His grandmother made a pair of new mukluks in one day. K’ughto’oodenool’o’ recounted story told by an elder, who "worked on the steamboats during the gold rush days out on the Yukon." In late August the caribou migrated from the Alaska Range up north to Huslia, Koyukuk, and the Tanana area. One year the steamboat was unable to continue they ran into a reindeer herd numbering estimated at a million animals, migrating across the Yukon. "They tied up for seven days waiting for the caribou to cross. "They ran out of wood for the steamboats, and had to go back down 40 miles to the wood pile to pick up some more wood. On the tenth day, they came back and they said there was still caribou going across the river night and day."

The reindeer vadzaih is the cultural symbol and a keystone subsistence species of the Gwich'in, just as the buffalo is to the Plains Indians. Innovative language revitalization projects are underway to document the language, and to enhance the writing and translation skills of younger Gwich'in speakers. In one project lead research associate and fluent speaker Gwich’in elder, Kenneth Frank, works with linguists which include young Gwich'in speakers affiliated with the Alaska Native Language Center at the University of Alaska in Fairbanks to document traditional knowledge of reindeer anatomy. Elders have identified at least 150 descriptive Gwich'in names for all of the bones, organs, and tissues "Associated with the caribou's anatomy are not just descriptive Gwich'in names for all of the body parts including bones, organs, and tissues as well as "an encyclopedia of stories, songs, games, toys, ceremonies, traditional tools, skin clothing, personal names and surnames, and a highly developed ethnic cuisine."

Reindeer husbandry

A reindeer sled, Arkhangelsk, Russia. Late nineteenth-century photochrom

Milking reindeer in the 19th century

The reindeer is the only domesticated deer in the world and was the last animal to be domesticated, though it may be more accurate to consider reindeer as semi-domesticated. Caribou in northern Fennoscandia (northern Norway, Sweden and Finland) as well in Kola Peninsula in Russia, are all semi-wild domestic reindeer (Rangifer tarandus domesticus), ear-marked by their owners and living in large fenced areas. Some reindeer in the area are truly domesticated, mostly used as draught animals (nowadays commonly for tourist entertainment and races, traditionally important for the nomadic Sámi). Domesticated reindeer have also been used for milk, e.g. in Norway.

There are only two genetically pure populations of wild caribous in Northern Europe: wild mountain reindeer (Rangifer tarandus ssp. tarandus) live in central Norway, with a population in 2007 of between 6,000 and 8,400 animals; and wild forest reindeer (Rangifer tarandus ssp. fennicus), in central and eastern Finland and in Russian Karelia, with a population of about 4,350, plus 1,500 in Arkhangelsk and 2,500 in Komi.

DNA analysis indicates that reindeer were independently domesticated in Fennoscandia and Western Russia (and possibly Eastern Russia). Reindeer have been herded for centuries by several Arctic and Subarctic people including the Sami and the Nenets. They are raised for their meat, hides, and antlers and, to a lesser extent, for milk and transportation. Reindeer are not considered fully domesticated, as they generally roam free on pasture grounds. In traditional nomadic herding, reindeer herders migrate with their herds between coast and inland areas according to an annual migration route and herds are keenly tended. However, reindeer were not bred in captivity, though they were tamed for milking as well as for use as draught animals or beasts of burden. Domesticated reindeer are shorter-legged and heavier than their wild counterparts.

The use of reindeer for transportation is common among the nomadic peoples of northern Russia (but not any more in Scandinavia). Although a sled drawn by 20 reindeer will cover no more than 20–25 km a day (compared to 7–10 km on foot, 70–80 km by a dog sled loaded with cargo, and 150–180 km by a dog sled without cargo), it has the advantage that the reindeer will discover their own food, while a pack of 5–7 sled dogs requires 10–14 kg of fresh fish a day.

The use of reindeer as semi-domesticated livestock in Alaska was introduced in the late 19th century by the U.S. Revenue Cutter Service, with assistance from Sheldon Jackson, as a means of providing a livelihood for Native peoples there. Reindeer were imported first from Siberia, and later also from Norway. A regular mail run in Wales, Alaska, used a sleigh drawn by reindeer. In Alaska, reindeer herders use satellite telemetry to track their herds, using online maps and databases to chart the herd's progress.

Domesticated reindeer are mostly found in northern Fennoscandia and Russia, with a herd of approximately 150–170 reindeer living around the Cairngorms region in Scotland. The last remaining wild tundra reindeer in Europe are found in portions of southern Norway. The International Centre for Reindeer Husbandry (ICR), a circumpolar organization, was established in 2005 by the Norwegian government. ICR represents over 20 indigenous reindeer peoples and about 100,000 reindeer herders in 9 different national states. In Finland, there are about 6,000 reindeer herders, most of whom keep small herds of less than 50 reindeer to raise additional income. With 185,000 reindeer (2001), the industry produces 2,000 tons of reindeer meat and generates 35 million euros annually. 70% of the meat is sold to slaughterhouses. Reindeer herders are eligible for national and EU agricultural subsidies, which constituted 15% of their income. Reindeer herding is of central importance for the local economies of small communities in sparsely populated rural Lapland.

Currently, many reindeer herders are heavily dependent on diesel fuel to provide for electric generators and snowmobile transportation, although solar photovoltaic systems can be used to reduce diesel dependency.

In history

Reindeer hunting by humans has a very long history, and wild reindeer "may well be the species of single greatest importance in the entire anthropological literature on hunting."

Both Aristotle and Theophrastus have short accounts – probably based on the same source – of an ox-sized deer species, named tarandos, living in the land of the Bodines in Scythia, which was able to change the colour of its fur to obtain camouflage. The latter is probably a misunderstanding of the seasonal change in reindeer fur colour. The descriptions have been interpreted as being of reindeer living in the southern Ural Mountains in c. 350 BC

Tragelaphus or deer-goat

A deer-like animal described by Julius Caesar in his Commentarii de Bello Gallico (chapter 6.26) from the Hercynian Forest in the year 53 BC is most certainly to be interpreted as reindeer:

There is an ox shaped like a stag. In the middle of its forehead a single horn grows between its ears, taller and straighter than the animal horns with which we are familiar. At the top this horn spreads out like the palm of a hand or the branches of a tree. The females are of the same form as the males, and their horns are the same shape and size.

According to Olaus Magnus's Historia de Gentibus Septentrionalibus – printed in Rome in 1555 – Gustav I of Sweden sent 10 reindeer to Albert I, Duke of Prussia, in the year 1533. It may be these animals that Conrad Gessner had seen or heard of.

During World War II, the Soviet Army used reindeer as pack animals to transport food, ammunition and post from Murmansk to the Karelian front and bring wounded soldiers, pilots and equipment back to the base. About 6,000 reindeer and more than 1,000 reindeer herders were part of the operation. Most herders were Nenets, who were mobilized from the Nenets Autonomous Okrug, but reindeer herders from Murmansk, Arkhangelsk and Komi also participated.

Santa Claus' reindeer

Two Scottish reindeer relax after pulling Santa's sleigh at the switching on of Christmas lights

Main article: Santa Claus's reindeer

Around the world, public interest in reindeer peaks in the Christmas period. According to folklore, Santa Claus's sleigh is pulled by flying reindeer. These were first named in the 1823 poem "A Visit from St. Nicholas", where they are called Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Dunder, and Blixem. Dunder was later changed to Donder and—in other works—Donner (in German, "thunder"), and Blixem was later changed to Bliksem, then Blitzen (blitz being German for "lightning"). Some consider Rudolph as part of the group as well, though he was not part of the original named work referenced previously. Rudolph was added by Robert L. May in 1939 as "Rudolph the Red-Nosed Reindeer".

In mythology and art

Among the Inuit, there is a story of the origin of the caribou,

Once upon a time there were no caribou on the earth. But there was a man who wished for caribou, and he cut a hole deep in the ground, and up this hole came caribou, many caribou. The caribou came pouring out, until the earth was almost covered with them. And when the man thought there were caribou enough for mankind, he closed up the hole again. Thus the caribou came up on earth.

— Canada's Arctic 2002a

Inuit artists from the barren lands, incorporate depictions of caribou—and items made from caribou antler and skin— in carvings, drawings, prints and sculpture.

Contemporary Canadian artist Brian Jungen's, of Dunne-za First Nations ancestry, commissioned installation entitled "The ghosts on top of my head" (2010–11) in Banff, Alberta, depicts the antlers of caribou, elk and moose.

I remember a story my Uncle Jack told me – a Dunne-Za creation story about how animals once ruled the earth and were ten times their size and that got me thinking about scale and using the idea of the antler, which is a thing that everyone is scared of, and making it into something more approachable and abstract.

— Brian Jungen 2011

Tomson Highway, CM is a Canadian and Cree playwright, novelist, and children's author, who was born in a remote area north of Brochet, Manitoba. His father, Joe Highway, was a caribou hunter. His 2001 children's book entitled Caribou Song/atíhko níkamon was selected as one of the "Top 10 Children’s Books" by the Canadian newspaper The Globe and Mail. The young protagonists of Caribou Song, like Tomson himself, followed the caribou herd with their families.

Heraldry and symbols

Several Norwegian municipalities have one or more reindeer depicted in their coats-of-arms: Eidfjord, Porsanger, Rendalen, Tromsø, Vadsø, and Vågå. The historic province of Västerbotten in Sweden has a reindeer in its coat of arms. The present Västerbotten County has very different borders and uses the reindeer combined with other symbols in its coat-of-arms. The city of Piteå also has a reindeer. The logo for Umeå University features three reindeer.

The Canadian 25-cent coin, or "quarter" features a depiction of a caribou on one face. The caribou is the official provincial animal of Newfoundland and Labrador, Canada, and appears on the coat of arms of Nunavut. A caribou statue was erected at the center of the Beaumont-Hamel Newfoundland Memorial, marking the spot in France where hundreds of soldiers from Newfoundland were killed and wounded in the First World War and there is a replica in Bowring Park, in St. John's, Newfoundland's capital city.

Two municipalities in Finland have reindeer motifs in their coats-of-arms: Kuusamo has a running reindeer and Inari a fish with reindeer antlers.

See also

• Rangifer (journal)
• Rangifer (constellation)
• Reindeer Police

Parasites

• Hypoderma tarandi
• Cephenemyia trompe

Further reading

• "Caribou Census Complete: 325,000 animals" (PDF), Caribou Trails: News from the Western Arctic Caribou Herd Working Group, Nome, Alaska: Western Arctic Caribou Herd Working Group, August 2012, retrieved 14 January 2014 This 15 page well-illustrated and highly informative August 2012 edition of the Western Arctic Caribou organization newsletter, reported the 2011 census results of the WACH, which is Alaska's largest caribou herd.

References

• "Gwich'in Traditional Management Practices", Arctic Circle, University of Connecticut, n.d., retrieved 16 September 2011
• "Caribou Mountains", Alberta Wilderness, Alberta Wilderness Association, retrieved 19 December 2013
• Banfield, Alexander William Francis (1961), "A Revision of the Reindeer and Caribou, Genus Rangifer", Bulletin, Biological Services, 177 (66), National Museum of Canada{{citation}}: CS1 maint: ref duplicates default (link)
• Bergerud, Arthur T. (1974), "Decline of caribou in North America following settlement", Journal of Wildlife Management, 38 (4): 757–770, doi:10.2307/3800042, JSTOR 3800042{{citation}}: CS1 maint: ref duplicates default (link)
• Bergerud, Arthur T. (1978), "Caribou", in Schmidt, J.L.; Gilbert, D.L. (eds.), Big game of North America: ecology and management, Harrison, PA.: Stackpole Books, pp. 83–101{{citation}}: CS1 maint: ref duplicates default (link)
• Bergerud, Arthur T. (1980) [1979], "A review of the population dynamics of caribou and wild reindeer in North America", in Reimers, E.; Gaare, E.; Skjenneberg, S. (eds.), Report of Proceedings Second International Reindeer/Caribou Symposium 1979, Roros, Norway, pp. 556–581{{citation}}: CS1 maint: location missing publisher (link) CS1 maint: ref duplicates default (link)
• Bergerud, Arthur T. (1988), "Caribou, wolves, and man", Trends in Ecology and Evolution, 3 (3): 68–72, doi:10.1016/0169-5347(88)90019-5, PMID 21227095{{citation}}: CS1 maint: ref duplicates default (link)
• Bergerud, Arthur T. (1996), "Evolving Perspectives on Caribou Population Dynamics, Have We Got it Right Yet?", Rangifer, Special Issue (9): 59–115{{citation}}: CS1 maint: ref duplicates default (link)
• Bergerud, Arthur T.; Luttich, Stuart N.; Camps, Lodewijk (December 2007), The Return of Caribou to Ungava, Native and Northern Series, McGill-Queen's, p. 656, ISBN 9780773532335, retrieved 16 December 2013{{citation}}: CS1 maint: ref duplicates default (link)

• Banfield, Alexander William Francis (1966), "The caribou", in Smith, I.N. (ed.), The Unbelievable Land, Ottawa: Queen's Press, pp. 25–28{{citation}}: CS1 maint: ref duplicates default (link)
• Banfield, Alexander William Francis (1974), Mammals of Canada, Toronto, Ontario: University of Toronto Press, p. 438{{citation}}: CS1 maint: ref duplicates default (link)
• Benson, Kristi (31 March 2011), "Gwich'in Traditional Knowledge: Woodland Caribou, Boreal Population" (PDF), Gwich’in Social and Cultural Institute, retrieved 2 November 2014{{citation}}: CS1 maint: ref duplicates default (link)
• Bennett, John (1 June 2008), Uqalurait: An Oral History of Nunavut, McGill-Queen's Native and Northern Series, McGill-Queen's University Press{{citation}}: CS1 maint: ref duplicates default (link)
• Bergerud, Arthur T. (1988), "Caribou, wolves, and man", Trends in Ecology and Evolution, 3 (3): 68–72, doi:10.1016/0169-5347(88)90019-5, PMID 21227095{{citation}}: CS1 maint: ref duplicates default (link)
• Bergerud, A.T. (29 April 2014), Caribou, The Canadian Encyclopedia, retrieved 3 September 2014{{citation}}: CS1 maint: ref duplicates default (link)
• Blix, A.S.; Johnsen, Helge Kreiitzer (1983), "Aspects of nasal heat exchange in resting reindeer", Journal of Physiology, 340: 445–454, doi:10.1113/jphysiol.1983.sp014772, PMC 1199219, PMID 6887057{{citation}}: CS1 maint: ref duplicates default (link)
• Boan, Julee (Spring 2005), "Caribou continue to retreat", ON Nature, 10{{citation}}: CS1 maint: ref duplicates default (link)
• Boan, Julee (n.d.), "The last of the caribou", Ontario Nature
• Burch Jr, Ernest S. (1972). "The Caribou/Wild Reindeer as a Human Resource". American Antiquity. 37 (3): 339–368. doi:10.2307/278435. JSTOR 278435. S2CID 161921691.{{cite journal}}: CS1 maint: ref duplicates default (link)

• Campbell, M.; Nishi, J.; Boulanger, J. (2010), A calving ground photo survey of the Qamanirjuaq migratory barren-ground caribou (Rangifer tarandus groenlandicus)
• "Tuktu — Caribou", Canada's Arctic, Guelph, Ontario, 2002, retrieved 17 January 2014
• "Tuktu — Caribou", Canada's Arctic, Guelph, Ontario, 2002a, retrieved 17 January 2014
• "Caribou habitat in Alberta ravaged beyond repair". CBC News. 26 August 2014. Retrieved 2 September 2014.
• "Caribou: In-depth", Canadian Geographic, November–December 2007
• "Gray Ghosts: Can we save woodland caribou in Canada's boreal forest?" (PDF), Canadian Parks and Wilderness Society (CPAWS), Ottawa, Ontario, October 2004, retrieved 17 January 2014
• "Population Critical: How are Caribou Faring?" (PDF), Canadian Parks and Wilderness Society and The David Suzuki Foundation, December 2013, retrieved 17 December 2013
• Kavanagh, Maureen, ed. (2005) [1985], "Hinterland Who's Who", Canadian Wildlife Service/EC, ISBN 0-662-39659-6, archived from the original on 24 December 2013, retrieved 21 December 2013
• "Another caribou herd in steep decline: study", CBC, 1 December 2008, retrieved 27 December 2013
• Chisholm, B.; Gutsche, A (1998), Superior: Under the Shadow of the Gods, Toronto: Lynx Images, ISBN 0-9698427-7-5{{citation}}: CS1 maint: ref duplicates default (link)
• "Designatable Units for Caribou (Rangifer tarandus) in Canada" (PDF), COSEWIC, Ottawa, Ontario: Committee on the Status of Endangered Wildlife in Canada, p. 88, 2011, archived from the original (PDF) on 3 March 2016, retrieved 18 December 2013
• "Subcommittees", COSEWIC, Committee on the Status of Endangered Wildlife in Canada, 2004, retrieved 16 January 2014
• Courtois, Rehaume; Ouellet, Jean-Pierre; Gingras, André; Dussault, Claude; Breton, Laurier; Maltais, Jean (2003), "Historical Changes and Current Distribution of Caribou, Rangifer tarandus, in Quebec", Canadian Field-Naturalist, 117 (3): 399–414, doi:10.22621/cfn.v117i3.742{{citation}}: CS1 maint: ref duplicates default (link)
• Courtois, Rehaume; Bernatchez, Louis; Ouellet, Jean-Pierre; Breton, Laurier (2003), "Significance of caribou (Rangifer tarandus) ecotypes from a molecular genetics viewpoint" (PDF), Conservation Genetics, 4 (3): 393–404, doi:10.1023/a:1024033500799, S2CID 34394002, retrieved 18 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• "Caribou", CPAWSNWT, Yellowknife, NWT: Canadian Parks and Wilderness Society Northwest Territories Chapter, 2010, retrieved 19 December 2013
• Cronin, Matthew A.; MacNeil, M. D.; Patton, J. C. (2005), "Variation in Mitochondrial DNA and Microsatellite DNA in Caribou (Rangifer tarandus) in North America" (PDF), Journal of Mammalogy, 86 (3): 495–05, doi:10.1644/1545-1542(2005)86[495:vimdam]2.0.co;2, S2CID 29939254, retrieved 17 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• Cronin, Matthew A. (1992), "Intraspecific variation in mitochondrial DNA of North American cervids", Journal of Mammalogy, 73 (1): 70–82, doi:10.2307/1381867, JSTOR 1381867{{citation}}: CS1 maint: ref duplicates default (link)
• Couturier, S.; Jean, D.; Otto, R.; Rivard, S. (2004), Demography of the migratory tundra caribou (Rangifer tarandus) of the Nord-du-québec region and Labrador (PDF), Québec: Ministère des Ressources Naturelles, de la Faune et des Parcs, Québec, and Direction de la recherche sur la faune, p. 68, archived from the original (PDF) on 20 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• Culling, Diane E.; Culling, Brad A. (May 2006), Ecology and seasonal habitat selection of boreal caribou in the Snake-Sahtaneh watershed, British Columbia: 2000 to 2004 (PDF), Fort St. John, British Columbia, archived from the original (PDF) on 21 December 2013, retrieved 19 December 2013{{citation}}: CS1 maint: location missing publisher (link) CS1 maint: ref duplicates default (link)

• de Souza, Mike (16 August 2013), Disappearing species and enforcement warnings to oil company flagged in federal records, o.canada
• Dugmore, Arthur Radclyffe (1913), The romance of the Newfoundland caribou, Philadelphia: Lippincott, p. 191, retrieved 2 November 2014{{citation}}: CS1 maint: ref duplicates default (link) Full-text.

• Eder, Tamara; Kennedy, Gregory (2011), Mammals of Canada, Edmonton, Alberta: Lone Pine, ISBN 978-1-55105-857-3
• Edmonds, E.J. (1988), "Population status, distribution and movements of woodland caribou in west central Alberta", Canadian Journal of Zoology, 66 (4): 817–826, doi:10.1139/z88-121{{citation}}: CS1 maint: ref duplicates default (link)
• Edmonds, Janet, "Status of woodland caribou in western north America", Rangifer (Special Issue 7), Edson, Alberta: Alberta Fish and Wildlife: 91–107 {{citation}}: Unknown parameter |conference= ignored (help)
• Ehrlich, Paul R. (January 2002), "Human natures, nature conservation, and environmental ethics" (PDF), BioScience, 52 (1), Stanford University: 31–43, doi:10.1641/0006-3568(2002)052[0031:hnncae]2.0.co;2, S2CID 14954285, retrieved 15 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• Canada, Environment (2012), "Recovery Strategy for the Woodland Caribou (Rangifer tarandus caribou), Boreal population, in Canada" (PDF), Environment Canada, Species at Risk Act Recovery Strategy Series, Ottawa, Ontario, p. 138, ISBN 978-1-100-20769-8, retrieved 18 December 2013
• "Boreal Caribou Aboriginal Traditional Knowledge (ATK) Reports: 2010-2011", Environment Canada, Ottawa, Ontario, June 2011
• "Cumulative Effects Management System (CEMS)", Environment and Sustainable Resource Development (ESRD), Edmonton, Alberta, archived from the original on 25 February 2014
• "Evaluation of Programs and Activities in Support of the Species at Risk Act" (PDF), Environment Canada, 24 September 2012, retrieved 27 December 2013
• "Briefing notes for meeting with Paul Boothe, DM and Mike Norton of Environment Canada and Gord Lambert, VP of Suncor", Environment Canada, Environment Canada meeting with Suncor, no. DM 156431, Calgary, Alberta: Scribd, p. 15, 11 May 2012
• "Canada-Alberta Deputy Ministers meeting on regulatory improvement", ER, Briefing notes, no. DM-153229, Ottawa, Ontario, p. 9, February 2013
• "Conserving Woodland Caribou: The Benchmark for Northern Sustainability", Reconciling our Priorities, ECO Annual Report, 2006-07, Toronto, Ontario: Environmental Commissioner of Ontario, 2007, pp. 75–81, retrieved 15 December 2013
• Reconciling our Priorities (PDF), ECO Annual Report, 2006-07, Toronto, Ontario: Environmental Commissioner of Ontario, 4 December 2007a, pp. 75–81, archived from the original (PDF) on 17 December 2013, retrieved 15 December 2013

• Festa-Bianchet, M.; Ray, J.C.; Boutin, S.; Côté, S.D.; Gunn, A.; et al. (2011), "Conservation of Caribou (Rangifer tarandus) in Canada: An Uncertain Future", Canadian Journal of Zoology, 89: 419–434, doi:10.1139/z11-025
• "Vuntut Gwich'in", First Voices, 2001–2013, retrieved 17 January 2014
• Flagstad, Oystein; Røed, Knut H (2003), "Refugial origins of reindeer (Rangifer tarandus L) inferred from mitochondrial DNA sequences" (PDF), Evolution, 57 (3): 658–670, doi:10.1554/0014-3820(2003)057[0658:roorrt]2.0.co;2, PMID 12703955, S2CID 198153587, archived from the original (PDF) on 4 September 2006, retrieved 4 January 2013
• * Foster, Robert F.; Harris, Allan G. (19 July 2012), Environmental Assessment for the Marathon PGM-Cu Project at Marathon, Ontario (PDF), Supporting Information Document No. 26: Assessment of impacts on Woodland Caribou, Thunder Bay, Ontario: Stillwater Canada Inc., retrieved 23 September 2014{{citation}}: CS1 maint: ref duplicates default (link)

• Geist, Valerius (1998), Deer of the world: their evolution, behavior, and ecology, Mechanicsburg, PA: Stackpole Books{{citation}}: CS1 maint: ref duplicates default (link)
• Geist, Valerius (2007), "Defining subspecies, invalid taxonomic tools, and the fate of the woodland caribou", Rangifer, 27 (Special Issue 17), The Eleventh North American Caribou Workshop (2006): 25–28, doi:10.7557/2.27.4.315, retrieved 17 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• George, Jane (25 May 2011), Nunavik caribou numbers in rapid free-fall: George River herd drops by 80 per cent, Nunavik, retrieved 17 December 2013{{citation}}: CS1 maint: location missing publisher (link) CS1 maint: ref duplicates default (link)
• Gillis, Natalie (2013), Separation Anxiety for Woodland Caribou, Canadian Wildlife Federation, archived from the original on 19 December 2013, retrieved 18 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• Gilbert, C.; Ropiquet, A.; Hassanin, A. (2006), "Mitochondrial and nuclear phylogenies of Cervidae (Mammalia, Ruminantia): Systematics, morphology, and biogeography", Molecular Phylogenetics and Evolution, 40 (1): 101–117, doi:10.1016/j.ympev.2006.02.017, PMID 16584894{{citation}}: CS1 maint: ref duplicates default (link)
• Godwin, L. (n.d.), Woodland Caribou in Northwestern Ontario Why they are different... (PDF), Northwestern Ontario Boreal Forest Management Technical Note TN-07, Ontario Ministry of Natural Resources, retrieved 19 December 2013
• Grubb, Peter (2005), Rangifer tarandus, Smithsonian: National Museum of Natural History, retrieved 15 January 2014{{citation}}: CS1 maint: ref duplicates default (link)
• Gunn, Anne; Russell, Don (March 2013), Changing abundance in migratory tundra caribou and wild reindeer and the role for a circumpolar collaborative network (PDF), Deer Specialist Group (DSG) newsletter, retrieved 15 January 2014{{citation}}: CS1 maint: ref duplicates default (link) CircumArctic Rangifer Monitoring and Assessment Network (CARMA), an international network researches on the status of the world's wild Rangifer (reindeer and caribou) populations, including effects of global changes, (climate change, industrial development). Conservation of Arctic Flora and Fauna (CAFF) is the biodiversity working group of the Arctic Council.
• Gunn, Anne; Miller, Frank L.; Thomas, D.C. (1979), "COSEWIC status report on the Peary caribou Rangifer tarandus pearyi in Canada", Committee on the Status of Endangered Wildlife in Canada (COSEWIC), Ottawa, p. 40
• Gunn, Anne; Nishi, J. (1998), "Review of information for Dolphin and Union caribou herd", in Gunn, A.; Seal, U.S.; Miller, P.S. (eds.), Population and Habitat Viability Assessment Workshop for the Peary caribou (Rangifer tarandus pearyi), Briefing book, Apple Valley, Minnesota: Conservation Breeding Specialist Group (SSC/UCN), pp. 1–22
• "The Gwich'in", Gwich'in Council International (GCI), Inuvik, NWT, 2010, retrieved 16 January 2014

• Henttonen, H.; Tikhonov, A. (2008), Rangifer tarandus, International Union for Conservation of Nature, retrieved 13 September 2014{{citation}}: CS1 maint: ref duplicates default (link)
• Hervieux, David; et al. (July 2005), "Alberta Woodland Caribou Recovery Plan 2004/5 - 2013/14" (PDF), The Alberta Woodland Caribou Recovery Team, archived from the original (PDF) on 4 March 2016, retrieved 3 November 2014
• Hoag, Hannah (15 December 2013), "Caribou genetics reveal shadow of climate change", Nature, doi:10.1038/nature.2013.14376, S2CID 131655028, retrieved 20 October 2014{{citation}}: CS1 maint: ref duplicates default (link)
• Hoare, Ben (2009), Animal Migration, London: Natural History Museum, p. 45, ISBN 978-0-565-09243-6{{citation}}: CS1 maint: ref duplicates default (link)
• Hornsby, Debra (25 August 2011), The ghosts on top of my head: Iconic sculpture creates campus focal point, Banff, Alberta, retrieved 31 January 2014{{citation}}: CS1 maint: location missing publisher (link) CS1 maint: ref duplicates default (link)
• Hughes, J.; Albon, S.D.; Irvine, R.J.; Woodin, S.; et al. (2009). "Is there a cost of parasites to caribou?". Parasitology. 136 (2): 253–265. doi:10.1017/s0031182008005246. PMID 19102793. S2CID 44524939. Cited in Vors' Phd (2013), Caribou

• "Rangifer tarandus caribou (Gmelin, 1788): Taxonomic Serial No.: 202411", Integrated Taxonomic Information System (ITIS), 18 December 2013, retrieved 18 December 2013

• Kavanagh, Maureen, ed. (2005) [1985], "Hinterland Who's Who", Canadian Wildlife Service/EC, ISBN 0-662-39659-6, archived from the original on 24 December 2013, retrieved 21 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• Klein, David R. (December 1980). "Conflicts Between Domestic Reindeer and Their Wild Counterparts: A Review of Eurasian and North American Experience" (PDF). Arctic. 33 (4). Calgary, Alberta: 739–756. doi:10.14430/arctic2593.{{cite journal}}: CS1 maint: ref duplicates default (link)
• Kolpashikov, Leonid; Makhailov, V.; Russell, Don (2015), "The role of harvest, predators and socio-political environment in the dynamics of the Taimyr wild reindeer herd with some lessons for North America", Ecology and Society, 20, doi:10.5751/ES-07129-200109{{citation}}: CS1 maint: ref duplicates default (link)
• Kurtén, Björn (1968). Pleistocene Mammals of Europe. Transaction Publishers. ISBN 978-1-4128-4514-4. Retrieved 6 August 2013.{{cite book}}: CS1 maint: ref duplicates default (link)

• Latham, A. David M.; Latham, M. Cecilia; McCutchen, Nicole A.; Boutina, Stan (2011), "Invading White-Tailed Deer Change Wolf-Caribou Dynamics in Northeastern Alberta", Journal of Wildlife Management, 75 (1): 204–212, doi:10.1002/jwmg.28, S2CID 85255272, retrieved 3 November 2014

• Lunn, Susan (17 December 2013), Woodland caribou still at risk, despite federal plan to help: Provinces, territories get poor grades for efforts to help in past 12 months, CBC News, retrieved 18 December 2013{{citation}}: CS1 maint: ref duplicates default (link)

• Mager, Karen H. (2012), Population Structure and Hybridization of Alaskan Caribou and Reindeer: Integrating Genetics and Local Knowledge (PDF) (PhD dissertation), Fairbanks, Alaska: e University of Alaska Fairbanks, retrieved 27 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• Mahoney, Shane P.; Weir, Jackie N.; Luther, J. Glenn; Schaefer, James A.; Morrison, Shawn F. (2011), "Morphological change in Newfoundland caribou: Effects of abundance and climate", Rangifer, 31 (1): 21–34, doi:10.7557/2.31.1.1917
• "Aboriginal leaders of Québec and Labrador unite to protect the Ungava caribou", Makivik, Kuujjuaq, Nunavik and Nain, Labrador, 24 April 2013a, retrieved 15 December 2013
• Mallory, F.F.; Hillis, T.L. (1998), "Demographic characteristics of circumpolar caribou populations: ecotypes, ecological constraints/releases, and population dynamics", Rangifer (Special Issue 10): 9–60, retrieved 18 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• McCloskey, Erin (2011), "Caribou", Wolves in Canada, Lone Pines, pp. 72–82, ISBN 978-1-55105-872-6{{citation}}: CS1 maint: ref duplicates default (link)
• McLoughlin, P.D.; Dzus, E.; Wynes, B.; Boutin, Stan (2003), "Declines in populations of woodland caribou", Journal of Wildlife Management, 67 (4): 755–761, doi:10.2307/3802682, JSTOR 3802682
• Moote, I. (1955), "The thermal insulation of caribou pelts", Textile Research Journal, 25 (10): 832–837, doi:10.1177/004051755502501002, S2CID 138926309{{citation}}: CS1 maint: ref duplicates default (link)
• Grubb, P. (2005). Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore, MD: Johns Hopkins University Press. ISBN 0-8018-8221-4. OCLC 62265494.

• Nagy, John A.; Auriat, Denise; Wright, Wendy; Slack, Todd; Ellsworth, Ian; Kienzler, Martin (n.d.), Ecology of Boreal Woodland Caribou in the Lower Mackenzie Valley, NT: Work Completed in the Inuvik Region April 2003 to November 2004 Accessed 2013
• "State of Canada's Forests 1999-2000: Forests in the New Millennium" (PDF), Natural Resources Canada, Ottawa, Ontario, 2000, ISBN 0-662-29069-0, retrieved 19 December 2013
• Naughton, Donna (2011), The Natural History of Canadian Mammals, Canadian Museum of Nature and University of Toronto Press, p. 543, ISBN 978-1-4426-4483-0{{citation}}: CS1 maint: ref duplicates default (link)
• "Nunavik's Leaf River caribou herd decreasing", Nunatsiaq News, Nunavik, 11 November 2011, retrieved 17 December 2011
• "Inuit, Inuu, Cree in Quebec and Labrador join forces to protect Ungava caribou: a united and powerful voice that will endeavour to preserve caribou", Nunatsiaq News, 26 April 2013, retrieved 14 January 2014
• "Size of Nunavik's George River caribou herd nosedives: new survey", Nunatsiaq News, 20 August 2012, retrieved 15 December 2012
• "Nunavik's Leaf River caribou herd decreasing", Nunatsiaq News, Nunavik, 11 November 2011, retrieved 17 December 2011
• Kangiqsualujjuaq, Nunavik Tourism, 2010, retrieved 15 December 2013
• GNWT, Species at Risk in the Northwest Territories 2012 (PDF), Government of Northwest Territories, Department of Environment and Natural Resources, ISBN 978-0-7708-0196-0, archived from the original (PDF) on 24 September 2015, retrieved 31 October 2014

• Ornstein, Robert Evan; Ehrlich, Paul R. (1989), New World New Mind: Moving Toward Conscious Evolution, New York: Doubleday, p. 302 See Robert E. Ornstein
• Ornstein, Robert Evan; Ehrlich, Paul R. (1989b), "Managing a world long gone: the old mind in politics, the environment, and war" (PDF), New World New Mind: Moving Toward Conscious Evolution, Nature, New York: Doubleday, p. 302, archived from the original (PDF) on 20 March 2013

• "Species at Risk:Woodland Caribou", Parks Canada, Government of Canada, 29 February 2012
• "All About Caribou: an Educator's Guide to North America" (PDF), Project Caribou, Whitehorse, Yukon: Yukon Department of Environment Conservation, Protection and Public Education Branch, p. 29, n.d., archived from the original (PDF) on 6 July 2013, retrieved 17 January 2014

• Racey, G.D.; Armstrong, T. (2000), "Woodland caribou range occupancy in northwestern Ontario: past and present", Rangifer, Special Issue, 12 (5): 173–184, doi:10.7557/2.20.5.1643
• Rahiman, Mohd Hezri Fazalul (2009), Heat exchanger (PDF), Malaysia, retrieved 3 November 2014{{citation}}: CS1 maint: location missing publisher (link) CS1 maint: ref duplicates default (link) caribou, also add to countercurrent heat exchange
• Rand, Silas Tertius (2006) [1875], First reading book in the Micmac language, Vancouver: Global Language Press [Nova Scotia Printing Company], ISBN 0-9738924-8-X{{citation}}: CS1 maint: ref duplicates default (link)
• Rand, Silas Tertius (1888), Dictionary of the language of the Micmac Indians, who reside in Nova Scotia, New Brunswick, Prince Edward Island, Cape Breton and Newfoundland, retrieved 17 January 2014{{citation}}: CS1 maint: ref duplicates default (link)
• Reid, F. (2006), Mammals of North America, Peterson Field Guides, ISBN 978-0-395-93596-5{{citation}}: CS1 maint: ref duplicates default (link)
• Rodgers, Arthur R.; Berglund, Nancy E.; Wade, Keith D.; Allison, Bradley A.; Iwachewski, Edward P. (27–29 November 2007), Forest-Dwelling Woodland Caribou in Ontario (PDF), CNFER Experimental Design Workshop Report, Thunder Bay, Ontario: Centre for Northern Forest Ecosystem Research (CNFER), Ontario Ministry of Natural Resources, p. 19, ISBN 978-1-4249-8289-9, retrieved 15 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• Russell, Don E.; Gunn, A. (20 November 2013), Migratory Tundra Rangifer, Annual Arctic Report Card, NOAA Arctic Research Program, retrieved 14 January 2014{{citation}}: CS1 maint: ref duplicates default (link) This report is rich in data regarding migratory herds in the entire circumpolar region, providing current data (up to 2013) on dozens of herds globally. The National Oceanic and Atmospheric Administration (NOAA) under the United States Department of Commerce, publishes an annual Arctic report card. Don Russell, is one of the founding members and current coordinator of CARMA. His post-graduate career spans over 4 decades included research on the Porcupine herd, and on oil activities around Prudhoe Bay, Alaska. He worked for the Government of Yukon the Canadian Wildlife Service.

• Woodland caribou boreal population - biology, SARA, October 2014, retrieved 3 November 2014
• Schaefer, J.A. (2003). "Long-term range recession and the persistence of caribou in the taiga". Conservation Biology. 17 (5): 1435–1439. doi:10.1046/j.1523-1739.2003.02288.x. S2CID 56067931.
• Seip, D.R. (1992), "Factors limiting caribou populations and their interrelationships with wolves and moose in southeastern British Columbia", Canadian Journal of Zoology, 70: 1494–1503, doi:10.1139/z92-206{{citation}}: CS1 maint: ref duplicates default (link)
• Shackleton, David (May 2013) [1999], Hoofed Mammals of British Columbia, pp. 272 pages, ISBN 978-0-7726-6638-3{{citation}}: CS1 maint: ref duplicates default (link)
• Shideler, R. T.; Robus, M.H.; Winters, J.F.; Kuwada, M. (June 1986), Impacts of Human Developments and Land Use on Caribou: a Literature Review Volume I: a Worldwide Perspective (PDF), Technical Report 86-2, Alaska Department of Fish & Game Habitat and Restoration Division, retrieved 18 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• Smith, B.E. (1998), "Antler size and winter mortality of elk: effects of environment, birth year, and parasites", Journal of Mammalogy, 79 (3): 1038–1044, doi:10.2307/1383113, JSTOR 1383113{{citation}}: CS1 maint: ref duplicates default (link)
• Sorensen, Troy; et al. (2008), "Determining Sustainable Levels of Cumulative Effects for Boreal Caribou" (PDF), Journal of Wildlife Management, 72 (4), Alberta Caribou Committee: 904, doi:10.2193/2007-079, S2CID 84380710
• Spalding, Alex (1998), Inuktitut – A Multi-Dialectal Outline Dictionary (with an Aivilingmiutaq base), Iqaluit, Nunavut: Nunavut Arctic College{{citation}}: CS1 maint: ref duplicates default (link)
• "Environmental Regulation" (PDF), Suncor, Annual Information Form, 1 March 2013, archived from the original (PDF) on 17 July 2013
• "Christmas reindeer mystery as world's largest herd plummets", Survival International Charitable Trust, 21 December 2011, retrieved 16 November 2012

• Thing, Henning; Olesen, Carsten Riis; Aastrup, Peter (1986), "Antler possession by west Greenland female caribou in relation to population characteristics", Rangifer, 6 (2): 297, doi:10.7557/2.6.2.662, retrieved 3 November 2014
• Thomas, D. C. (1998), "Needed: less counting of caribou and more ecology", Rangifer, Special Issue Number 10 (5): 15–23, doi:10.7557/2.18.5.1394{{citation}}: CS1 maint: ref duplicates default (link) Thomas suggested that "if population surveys cannot be expected to produce accurate and precise results, funding is better directed to collecting information on demographic indices, such as pregnancy rates and calf survival, as well as ecological studies to identify habitat requirements (Culling and Culling 2006:44)."
• Thomas, D. C.; Gray, D. R. (2002), Update COSEWIC status report on the woodland caribou (Rangifer tarandus caribou) in Canada, Ottawa, Ontario: Committee on the Status of Endangered Wildlife in Canada, p. 98{{citation}}: CS1 maint: ref duplicates default (link) "Thomas and Graynote that caribou populations are prone to wide fluctuations in numbers and suggest a 20-year span (3 generations) should be adopted as the standard for assessing trends (Culling and Culling 2006:46)."

• Varga, Peter (20 December 2013), Warming climate threatens caribou in Nunavik, Labrador, Baffin: Study links species' survival with stable climate (PDF), Institute of Arctic Biology, retrieved 14 January 2014{{citation}}: CS1 maint: ref duplicates default (link)
• Varga, Peter (14 March 2013), Beverly caribou decline not as drastic as once feared: new study, retrieved 27 December 2013
• Vors, L. S; Boyce, M. S. (2009). "Global declines of caribou and reindeer". Global Change Biology. 15 (11): 2626–2633. doi:10.1111/j.1365-2486.2009.01974.x. S2CID 86111815.{{cite journal}}: CS1 maint: ref duplicates default (link)
• Vors, Liv Solveig (2013). Caribou in Canada: Ecology and Policy. Ecology, Department of Biological Sciences (PhD). Edmonton, Alberta: University of Alberta. p. 140.{{cite thesis}}: CS1 maint: ref duplicates default (link) Caribou Useful resource. Recent, excellent summaries. Very strong bibliographic references. Captures main categories, subsections.
• Vors, L.S.; Schaefer, J.A.; Pond, B.A.; R. Rodgers, Arthur; Patterson, B.R. (2007), "Woodland caribou extirpation and anthropogenic landscape disturbance in Ontario", Journal of Wildlife Management, 71 (4): 1249–1256, doi:10.2193/2006-263, S2CID 54202231

• Walker, Matt (6 November 2009), News-Reindeer herds in global decline, BBC Earth, BBC News, retrieved 21 January 2014{{citation}}: CS1 maint: ref duplicates default (link)
• Wells, Jeff (2 January 2013), In Decline, Caribou Face a Tough Winter in Canada, National Geographic Society, retrieved 15 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• "Caribou Census Complete: 325,000 animals" (PDF), Caribou Trails: News from the Western Arctic Caribou Herd Working Group, Nome, Alaska: Western Arctic Caribou Herd Working Group, Alaska Department of Fish and Game, August 2012, retrieved 14 January 2014
• "Woodland Caribou: Rangifer Tarandus" (PDF), Wildlife Division Government of Newfoundland, 2009, archived from the original (PDF) on 26 November 2013, retrieved 14 January 2014
• "Summary Report 2006 Maxhamish Range Boreal Caribou Inventory: Kiwigana, Fortune, and Capot-Blanc Core Areas" (PDF), Wildlife Inventory Program, March 2006, retrieved 19 December 2013
• Wilkinson, Christopher J. A. (2008), "An examination of recovery planning for forest-dwelling woodland caribou (Rangifer tarandus caribou) in Ontario, Canada", Rangifer, 28 (1), Ontario, Canada: Office of the Environmental Commissioner: 13–32, doi:10.7557/2.28.1.147, retrieved 15 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• Wilson, Don E.; Reeder, DeeAnn M. (2005), Mammal Species of the World, vol. 1 & 2, Baltimore, Maryland, USA: Johns Hopkins University Press, ISBN 0-8018-8221-4, retrieved 18 December 2013{{citation}}: CS1 maint: ref duplicates default (link)
• "Woodland Caribou" (PDF), Wildlife Division, Government of Newfoundland, 2009, archived from the original (PDF) on 26 November 2013, retrieved 14 January 2014
• Witter, L.A.; Johnson, C.J.; Croft, B.; Gunn, Anne; Poirier, L.M.; et al. (2012). "Gauging climate change effects at local scales: weather-based indices to monitor insect harassment in caribou". Ecological Applications. 22 (6): 1838–1851. doi:10.1890/11-0569.1. PMID 23092020.

• Yannic, Glenn; et al. (February 2014), "Genetic diversity in caribou linked to past and future climate change" (PDF), Nature Climate Change, 4 (2), Laval, Quebec: 132–137, doi:10.1038/NCLIMATE2074, retrieved 20 October 2014

• Zielinski, Sarah (16 December 2013), "Six Ways Climate Change Is Waging War on Christmas", Smithsonian Magazine, retrieved 16 August 2014{{citation}}: CS1 maint: ref duplicates default (link)
• Zager, Peter; Mills, L. Scott; Wakkinen, Wayne; Tallm, David (n.d.), Woodland Caribou: A Conservation Dilemma, University of Michigan, retrieved 18 December 2013

Bibliography

• "Designatable Units for Caribou (Rangifer tarandus) in Canada" (PDF). COSEWIC. Ottawa, Ontario: Committee on the Status of Endangered Wildlife in Canada. 2011. Retrieved 18 December 2013.

External links

• The Reindeer Portal, Source of Information About Reindeer Husbandry Worldwide
• 1935 Reindeer Herding in the Northwest Territories
• General information on Caribou and Reindeer
• Human Role in Reindeer/Caribou Systems
• Reindeer hunting as World Heritage – a ten-thousand-year-long tradition
• Reindeer Research Program – Alaska reindeer research and industry development
• Adaptations To Life In The Arctic – Instructional slide-show, University of Alaska
• Rangifer – world's only scientific journal dealing exclusively with husbandry, management and biology of Arctic and northern ungulates
• Rangifer tarandus on the IUCN Red List
• Texts on Wikisource:
  • Ingersoll, Ernest (1920). "Caribou". Encyclopedia Americana.
  • Lydekker, Richard (1911). "Reindeer". Encyclopædia Britannica (11th ed.).
  • "Reindeer". New International Encyclopedia. 1905.
• "The Other 364 Days of the Year: The Real Lives of Wild Reindeer Categories: Biology and Ecosystems". U.S. Geological Survey. 15 December 2014. {{cite web}}: Cite uses deprecated parameter |authors= (help)
• "Reference Article: Reindeer (caribou)". ScienceDaily. Retrieved 25 December 2015.

Caribou-specific links (North America)

• Frequently Asked Questions about Caribou from the Arctic National Wildlife Refuge
• Caribou and You – Campaign by CPAWS to protect the woodland caribou, a species at risk in Canada
• Newfoundland Five-Year Caribou Strategy Seeks to Address Declining Populations