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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	The diurnal Afro-alpine raptor community of the ethiopian Bale Highlands
Auteurs :	M. Clouet, Auteur ; C. Barrau, Auteur ; J. L. Goar, Auteur
Type de document :	Article
Dans :	Ostrich (71(3-4) SEP 2000)
Article en page(s) :	380-384
Langues:	Anglais
Résumé :	The diurnal raptor community of the Afro-alpine level of the Bale Highlands (i.e. 3500-4000 m a.s.l.) Ethiopia was observed during eight expeditions spread over five consecutive years. Among the 25 species recorded, nine are residents, including three which nest at lower altitudes. Small mammal hunters are the most numerous species, including a unique assemblage of various Aquila species, among which the Golden fog re Aquila chrysaetos is the outstanding feature. population densities ore high for Golden Eagle and Verreaux's Eagle, Aquila verreauxii, Towny and Steppe Eagles, Aquila rapax and A. nipalensis, Augur Burzard, Buteo augur and Lanner Falcon, Falco biarmicus. This is related to the abundance of prey, mainly hyraxes, hares and rodents. For the largest species, the start of breeding coincides with the onset of the dry season (November). The period with the largest number of young raptors on the nest (February-March) corresponds to the peak in the prey population. Migrants and Palaearctic winter visitors ore present at the some time and use the some food resources as the breeders. The main factors isolating closely related species ore diet for the Golden and Verreaux's Eagles and the period of habitat use for the Towny and Steppe Eagles.

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