The band-tailed antwren (Myrmotherula urosticta) is a Vulnerable species of insectivorous bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is endemic to Brazil.[2][1]
| Band-tailed antwren | |
|---|---|
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| Illustration (above) (lower bird Myrmotherula hauxwelli) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Thamnophilidae |
| Genus: | Myrmotherula |
| Species: | M. urosticta
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| Binomial name | |
| Myrmotherula urosticta (Sclater, PL, 1857)
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Taxonomy and systematics
editThe band-tailed antwren was described by the English zoologist Philip Sclater in 1857 and given the binomial name Formicivora urosticta.[3] The species is monotypic.[2] The band-tailed antwren and the long-winged antwren (M. longipennis) form a superspecies.[4]
Description
editThe band-tailed antwren is 9 to 10 cm (3.5 to 3.9 in) long. It is a smallish bird with a short tail. Adult males have gray upperparts with a hidden white patch between the shoulders. Their wings are gray with white-tipped black coverts. Their tail is darker gray with the eponymous wide white band at the end. Their throat and upper breast are black; the rest of their underparts are a paler gray than the upperparts. Adult females have a paler gray face and upperparts than males with white-tipped gray wing coverts. Their throat is white, their sides and flanks gray, and the rest of their underparts pale cinnamon-buff.[5][6]
Distribution and habitat
editThe band-tailed antwren is a bird of the Atlantic Forest. It found very spottily and locally in coastal eastern Brazil between Bahia and northern Rio de Janeiro state. The largest numbers are found in the southern Bahia-northern Espírito Santo area. It inhabits the understorey to mid-storey of evergreen forest and adjacent mature secondary forest in the lowlands. It appears to favor tall forest on sandy soil, especially those with abundant vines in their lower reaches. In elevation it occurs below about 500 m (1,600 ft).[5][6]
Behavior
editMovement
editThe band-tailed antwren is believed to be a year-round resident throughout its range.[5]
Feeding
editThe band-tailed antwren's diet is not known in detail but is probably mostly mostly insects and spiders. It forages singly, in pairs, or in family groups, and usually as part of a mixed-species feeding flock. It typically forages on fairly open leafy branches. It feeds mostly between about 3 and 10 m (10 and 30 ft) above the ground but will go as high as 20 m (70 ft), though rarely. It seeks prey mostly by gleaning live leaves, and also takes prey from clusters of dead leaves, vine tangles, and along branches by gleaning, reaching, lunging, and with short sallies from a perch.[5][6]
Breeding
editNothing is known about the band-tailed antwren's breeding biology.[5]
Vocalization
editThe band-tailed antwren's song is a "short series of 4-5 very high, nasal, well-separated, sharply upslurred 'tjeuwi' notes".[6] Its most common call is "three notes...dropping in pitch".[5]
Status
editThe IUCN originally in 1988 assessed the band-tailed antwren as Near Threatened, then in 1994 as Vulnerable, in 2000 as Endangered, and since 2004 again as Vulnerable. Its estimated population of between 2500 and 10,000 mature individuals is scattered and fragmented and is believed to be decreasing. The primary threat is habitat destruction. "Virtually all lowland Atlantic forest outside protected areas has been cleared within its historical range, and even some of the protected areas in which it occurs are not secure ".[1] It is considered uncommon and local. Though it is known mostly from five protected areas in southern Bahia, "[s]ignificant portions of these reserves encompass habitat not suitable for this species, for which the effective protected area is therefore much smaller than it may seem".[5]
References
edit- ^ a b c BirdLife International (2023). "Band-tailed Antwren Myrmotherula urosticta". IUCN Red List of Threatened Species. 2023: e.T22701533A223504937. doi:10.2305/IUCN.UK.2023-1.RLTS.T22701533A223504937.en. Retrieved 13 February 2024.
- ^ a b Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (January 2024). "Antbirds". IOC World Bird List. v 14.1. Retrieved January 4, 2024.
- ^ Sclater, Philip L. (1857). "Descriptions of twelve new or little known species of the South American family Formicariidae". Proceedings of the Zoological Society of London. 25: 129–133 [130] Plate 126 fig. 1. doi:10.1111/j.1096-3642.1857.tb01217.x.
- ^ Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, G. Del-Rio, A. Jaramillo, D. F. Lane, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 26 November 2023. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved November 27, 2023
- ^ a b c d e f g Zimmer, K., M.L. Isler, and E. de Juana (2020). Band-tailed Antwren (Myrmotherula urosticta), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.batant3.01 retrieved February 13, 2024
- ^ a b c d van Perlo, Ber (2009). A Field Guide to the Birds of Brazil. New York: Oxford University Press. pp. 244–245. ISBN 978-0-19-530155-7.
Data related to Myrmotherula urosticta at Wikispecies