White-rumped falcon

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Scientific classification Edit this classification
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Binomial name
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(Walden, 1872)
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Synonyms

Polihierax insignis

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The white-rumped falcon (Neohierax insignis) is a species of bird of prey in the family Falconidae native to Indochina. It is placed in its own monotypic genus, Neohierax.

Taxonomy and naming

Philip Sclater, secretary of the Zoological Society of London, presented two skins at the meeting of 7 November 1871, on behalf of the society's president Arthur Hay, Viscount Walden. A brief account of this presentation was published in 1872, becoming the first formal description of the species.[2][3]

In 1922, Harry Kirke Swann proposed a new monotypic genus for this bird, Neohierax.[4][5] During the 20th century, most taxonomic authorities retained it in Polyhierax, though Brown and Amadon supported separating the two genera. Phylogenetic analyses of morphological characteristics found the white-rumped falcon to be basal to the Falco clade, but separate from the clade containing the pygmy falcon (or African pigmy falcon, Polihierax semitorquatus) and Microhierax (falconets or pigmy falcons).[5]

Research in molecular genetics[6] has also found that the white-rumped falcon is more closely related to the Falco falcons than it is to the pygmy falcon, and indicates two major clades within the extant members of the falcon subfamily, Falconinae. Boyd places the Microhierax falconets with the pygmy falcon in tribe Polihieracini, and the white-rumped falcon as Neohierax insignis in tribe Falconini.[7]

The white-rumped falcon is also known as white-rumped pygmy falcon, white-rumped falconet, Fielden's falconet,[1] or Burmese pigmy falcon.[4]

Description

The plumage is white underneath and on the rump, with black ticking on the chest. The upper surface of the wings is dark grey. Sexually dimorphic, the female has a rufous[note 1] mantle on her upper back and behind the head, whereas in the male these areas are grey. The tail is black, barred with white.[2][4]

The shape of the tail is notably rounded, with the outermost feathers an inch shorter than the middle ones.[2] Its wings have the pointed shape typical of falcons, with the second primary feathers longest, and the first nearly equal to the third.[4][note 2]

Its legs and feet are yellow, hence the French name Script error: No such module "Lang". (yellow-legged falconet). Base of the bill and skin surrounding the eye are yellow. Tip of the beak is grey or horn-coloured.

The wings are Template:Cvt long, and the tail is Template:Cvt.[4] Modern sources give the overall length as Template:Cvt, weight Template:Cvt, and wingspan Page Template:Fraction/styles.css has no content.42–49 centimetres (16+1⁄2–19+1⁄4 in).[8]

Its coloration is similar to the African pygmy falcon (Polihierax semitorquatus), but the white-rumped falcon is larger and proportionally longer-tailed.

Distribution and habitat

Found in Cambodia, Laos, Myanmar, Thailand, and Vietnam,[1] its natural habitats are subtropical or tropical dry forests and dry savanna. The IUCN considers it "near-threatened" by habitat loss due to logging and forest fires, and possibly hunting.[1]

Behaviour

Feeding

White-rumped falcons feed on lizards and insects, which are taken from the ground or in trees. Unlike Microhierax falconets, they do not hawk insects from the air.[5]

Breeding

This species has been little studied in the wild. It uses holes in trees for nesting, the female incubates the eggs during the day. The female lays a clutch of two white eggs, approximately Template:Cvt long.[5][8]

A pair have been observed to nest in a woodpecker hole, both the male and female roosting there overnight.[5]

Notes

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  1. ^ Described as "deep chestnut" by Walden and "bright ferruginous red" by Swann.
  2. ^ Note the similarity in Swann's descriptions for the primary flight feathers of Polihierax, p. 183, Neohierax, p. 184, and Falco, p. 186.

References

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  1. ^ a b c d Template:Cite iucn
  2. ^ a b c Page Module:Citation/CS1/styles.css has no content.Walden, Arthur Viscount (1872). "Notice of a new Species of Polihierax from Upper Burmah". Proceedings of the Zoological Society of London. 1871 (part 3, November 7): 627–628.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Peterson, Alan P. (2013). "Zoonomen nomenclatural data". Retrieved 3 November 2014.
  4. ^ a b c d e Page Module:Citation/CS1/styles.css has no content.Swann, Harry Kirke [in français] (1922). A synopsis of the Accipitres (diurnal birds of prey): comprising species and subspecies described up to 1920, with their characters and distribution (2nd ed.). London: Wheldon & Wesley. p. 184.
  5. ^ a b c d e Page Module:Citation/CS1/styles.css has no content.Kasorndorkbua, Chaiyan (17 February 2011). "Species account: white-rumped falcon Neohierax insignis". Global Raptor Information Network. Archived from the original on 2012-10-28. Retrieved 2 November 2014.
  6. ^ Page Module:Citation/CS1/styles.css has no content.Fuchs, Jérôme; Johnson, Jeff A.; Mindell, David P. (September 2014). "Rapid diversification of falcons (Aves: Falconidae) due to expansion of open habitats in the Late Miocene". Molecular Phylogenetics and Evolution. 82: 166–182. doi:10.1016/j.ympev.2014.08.010. PMID 25256056.
  7. ^ Page Module:Citation/CS1/styles.css has no content.Boyd, John H. III (1 October 2014). "Passerimorphae (version 2.76a)". Taxonomy in Flux Checklist. Archived from the original on 2014-10-06. Retrieved 2 November 2014.
  8. ^ a b Page Module:Citation/CS1/styles.css has no content.Clarke, W. S.; Kirwan, G. M. (2013). del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D. A. (eds.). "White-rumped Pygmy-falcon (Polihierax insignis)". Handbook of the Birds of the World Alive. Barcelona: Lynx Editions. doi:10.2173/bow.whrfal1.01.1. Retrieved 4 November 2014. alt. URL

Media

Taxonomy

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