(or Accipitriformes, q.v.)
|Ayres's hawk-eagle Range|
Ayres's hawk-eagle (Hieraaetus ayresii), also referred to as Ayres' eagle, is a medium-sized bird of prey in the family Accipitridae. It is native to African woodlands. Its name honors South African ornithologist Thomas Ayres.
Description and Behavior
This relatively small eagle has a total length of 46 to 55 cm (18 to 22 in). It usually weighs 685 to 1,045 g (1 lb 8.2 oz to 2 lb 4.9 oz); but may exceed 1,262 g (2 lb 12.5 oz). The female is larger and heavier than the male. In one study, the wingspan of two individuals averaged 124 cm (49 in). Ayres's hawk-eagle has a long, barred tail and relatively narrow wings. The adult plumage is predominantly black/brown, with heavily streaked white underparts; in some individuals, the underparts are much paler. Adults typically have a pronounced white shoulder where the leading edge of the wing meets the body (the carpal joint). The immature is drab and paler.
Distribution and Habitat
Ayres' eagle is an uncommon resident of non-arid Sub-Saharan Africa, and a non-breeding summer migrant to the far south of its range (South Africa; southern Zimbabwe, Mozambique). It appears to prefer dense woodland and forest edges.
Although an uncommon bird throughout its range, it is classified as Least Concern (LC) by the IUCN, due to its large range and its numbers - while small - appearing stable at the present time.
- BirdLife International (2012). "Hieraaetus ayresii". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- Newman, K (1998) Newman's Birds of Southern Africa. Halfway House: Southern Book Publishers. ISBN 1868127680.
- Beolens, Bo; Watkins, Michael (2003). Whose Bird? Men and Women Commemorated in the Common Names of Birds. London: Christopher Helm. p. 33.
- Sinclair, I & Davidson, I (1995) Southern African Birds: A Photographic Guide. Cape Town: Struik Publishers. ISBN 1868257851
- Mendelsohn J.M.; Kemp, A.C.; Biggs, H.C.; Biggs, R.; &Brown, C.J. (1989) Wing Areas, Wing Loadings and Wing Spans of 66 Species of African Raptors, Ostrich, Vol. 60, No.1, p. 35-60
- Allan, D. 1996. A Photographic Guide to Birds of Prey of Southern, Central and East Africa. Cape Town: New Holland Publishers. ISBN 1853689033.
- (Ayres's hawk-eagle = ) Ayres' eagle - Species text in The Atlas of Southern African Birds
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