Hellenica World

Melierax poliopterus

Melierax poliopterus (*)

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Aves
Subclassis: Carinatae
Infraclassis: Neornithes
Parvclassis: Neognathae
Ordo: Falconiformes
Familia: Accipitridae
Subfamilia: Melieraxinae
Genus: Melierax
Species: Melierax poliopterus

Name

Melierax poliopterus Cabanis, 1868

References

* Journal für Ornithologie 16 p.413


Vernacular names
Česky: Jestřáb východoafrický
English: Pale Chanting Goshawk or Eastern Chanting-Goshawk
Español: Azor lagartijero del este

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The Eastern (Pale) Chanting Goshawk or Somali Chanting Goshawk, Melierax poliopterus, is a bird of prey of East Africa.

Range and habitat

It occurs in semidesert, dry bush, and wooded grassland below 2000 in southern Ethiopia, Djibouti, western Somalia, eastern Kenya, northeastern Tanzania, and adjacent Uganda.[1]

Description

This species averages 49 to 55 cm long, with a wingspan of 96 to 110 cm and a tail length of 20 to 25 cm. Males average 85% of the size of females. Like the other chanting goshawks, it resembles an accipiter but the tail is shorter and graduated (the feathers increase in length from the edges to the center), and the wings are broader.[1]

Adults have grey head, neck, breast, and upperparts, except for the white or lightly barred upppertail coverts. The belly has narrow grey and white bars and the undertail coverts are white. The belly and wing linings are white, the secondaries are light grey, and the primaries are dark, giving an impression from below of a white bird with grey head and dark wingtips. The tail is blackish above and white below with grey bars. The cere is yellow, and the legs are orange-red. Juveniles are dull brown above with a pale stripe over the eye. They have white underparts with brown streaks on the throat and breast, brown bars on the belly coverts, and faint or no barring on the undertail coverts. The tail is brown with widely spaced darker brown bars. The rump is white, partially barred or unmarked. They are indistinguishable from some juvenile Dark Chanting Goshawks except for the less barred undertail coverts and rump. Also, the legs are slightly longer at all ages than the Dark Chanting Goshawk's.[2]

Behavior

The Eastern Chanting Goshawk is usually seen alone.[1] It often perches on the tops of trees and utility poles.[1][2] Its wingbeats are shallow and "straight-arm". It holds its wings flat, or sometimes in a V, when it glides.[1]

Its calls are "a melodious piping whee-pee-pee-pee, and a long high-pitched kleee-yeu", slightly lower-pitched than those of the Dark Chanting Goshawk,[2] or "peeu-peeu-peeu-pee-pee-pee-pee..." in the nesting season, the source of its name.[1]

Relationships

This species is intermediate between the smaller Dark Chanting Goshawk (widespread to the west and south) and the Pale Chanting Goshawk (southern Africa) in color, size, and leg length, but not in range. It has often been considered a subspecies of the latter, but because of this disparity between geography and characters, it is now considered a separate species,[1] as agreed by many authorities.[2][3][4][5][6]

References

1. ^ a b c d e f g Ferguson-Lees, James; Christie, David A. (2001), Raptors of the World, Houghton Mifflin Harcourt, pp. 146–147, http://books.google.com/books?id=hlIztc05HTQC&pg=PA146#v=onepage&q=&f=false, retrieved 2010-04-02
2. ^ a b c d Zimmerman, Dale A.; Turner, Donald A.; Pearson, David J. (1999), Birds of Kenya and Northern Tanzania, Princeton University Press, pp. 84–85, 90–91, 100–101, 300, ISBN 0-691-01022-6
3. ^ BirdLife International 2009. Melierax poliopterus. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.1. Downloaded on 02 April 2010.
4. ^ Lack, Peter (January, 2009). "ABC Checklist of African Birds: non-passerines". African Bird Club. http://www.africanbirdclub.org/resources/may2009/ABCChecklist_nonpasserines_jan2009.doc. Retrieved 2010-04-02.
5. ^ Clements, James F. (2007), The Clements Checklist of Birds of the World, Cornell University Press, p. 39, ISBN 0801445019
6. ^ Gill, F.; Donsker, D. (Eds) (2010), IOC World Bird Names (version 2.4), http://www.worldbirdnames.org/n-raptors.html, retrieved 2010-04-02

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