La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Nest placement and nesting success in two finch species colonizing a recently established plantation in an arid region
Auteurs :	Fares Khoury, Auteur ; Mohammed Janaydeh, Auteur ; Abdel Razzaq Al-Hmoud, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (150(1) JAN 2009)
Article en page(s) :	29-37
Langues:	Anglais
Résumé :	This study examines variations in nest placement and its effects on nesting success in the Desert Finch (Rhodospiza obsoleta) and the Linnet (Carduelis cannabina) which coexist in a recently established plantation (novel habitat) in a desert region in Jordan. A comparison with other habitats (old plantation in the desert and native, Mediterranean-type, habitat of the Linnet) showed that each species displayed similarity in nest placement patterns across habitats. Nest concealment predicted nesting outcome in the Linnet, whereas nest height predicted nesting outcome in the Desert Finch. Daily survival rates were significantly higher in Desert Finch nests compared to the Linnet's, perhaps because Desert Finches placed nests higher in the novel habitat, which lacked aerial nest predators. In accordance with predation theories of life history evolution, we provide evidence that variation in nest placement among the two species in a novel habitat resulted from previous exposure to different predation risks.

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