Portal:Primates/Did you know

Did you know 1

... that experiments have indicated that ruffed lemurs (pictured) can understand the outcome of simple arithmetic operations?
... that unlike most other lemurs, the collared brown lemurs do not demonstrate female dominance?
... that the gray mouse lemur is one of the smallest primates in the world, weighing only 60 grams (2.1 oz)?
... that between 2000 and 2008, 39 new species of lemur (ring-tailed lemur) were described in Madagascar, bringing the total number of recognized species and subspecies to 99?
... that the pied tamarin, an endangered primate of the Amazon basin, is being gradually displaced by the red-handed tamarin?
... ... that illegal logging in Madagascar has been an ongoing problem, which escalated after the 2009 Malagasy political crisis, threatening endangered species such as lemurs?

... that both Margot Marsh's mouse lemur and Arnhold's mouse lemur are separated from their closest relatives by species barriers?
... that the gestation period of the ring-tailed lemur is approximately 146 days?
... that the endangered golden lion tamarin has a long, but not prehensile, tail?
... that until December 2008, the red lemur and the red-fronted lemur (pictured) were considered the same species?
... that the gray-handed night monkey is nocturnal and monogamous?
... that Corcovado National Park is the only national park in which all of Costa Rica's four native monkey species can be found?

... that in addition to insects, the diet of the common brown lemur (pictured) includes soil and red clay?
...that the infant red-bellied lemur rides on both mother and father, but after age 33 days, only the father offers transport?
... that agile mangabeys are known to contract the T-cell leukemia virus, similar to the leukemia virus that infects humans?
... that the birth rates of the southern woolly lemur are affected by the degradation level of their habitat?
... that the extinct monkey lemurs, including Hadropithecus, were most closely related to modern indris and sifakas, as well as the extinct sloth lemurs?
...that the diademed sifaka is an athletic lemur whose small groups defend a rainforest territory of up to 125 acres by scent marking?

... that although male Kashmir gray langurs are usually protective of infants, they sometimes engage in infanticide?
... that Geoffroy's spider monkey (pictured) has a prehensile tail that can support its entire body weight?
... that the monkey "Marcel" on the TV sitcom Friends was a white-headed capuchin?
... that the Guatemalan black howler and mantled howler monkeys are sympatric over parts of Mexico and Guatemala?
... that the sloth lemurs of the genus Mesopropithecus were once thought to be indriids due to the similarities between their skulls and those of living sifakas?
... that the discovery of Babakotia radofilai, an extinct species of sloth lemur, helped to resolve the relationship between the indriids, sloth lemurs, and monkey lemurs?