La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Biology of Frances's Sparrowhawk, Accipiter francesiae, on the Comoro Islands
Auteurs :	M. Herremans, Auteur ; M. Louette, Auteur ; J. Stevens, Auteur
Type de document :	Article
Dans :	Ostrich (72(1-2) MAR 2001)
Article en page(s) :	1-9
Langues:	Anglais
Résumé :	Throughout their range on Madagascar and in the Comoros Frances's Sparrowhawks, Accipiter francesiae, breed from October to December, in the late dry/early wet season, resulting in young leaving the nest before or when the heavy rains start in January/February. In contrast to Madagascar, nests on Mayotte (Comoros) are placed in exposed positions, and are maintained and enlarged after the young fledge, possibly as a form of territorial advertisement. On overage, two young fledged per successful nest, and 1.5 fledged per nesting attempt. During the breeding season, sparrow-hawks on Mayotte consume more reptiles than do those on Madagascar. On Mayotte, second-year birds can be recognized by plumage type. Recruitment into the breeding population does not occur during the first year, but possibly only from the third year Frances's Sparrowhawks are unevenly distributed on Mayotte and post-breeding dispersal may take place from the wettest zone, where the highest breeding densities occur, to the drier southeastern parts.

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