La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Stable-hydrogen isotope analyses suggest natural vagrancy of Baikal Teal to Britain
Auteurs :	Stephen C. Votier, Auteur ; Gabriel J. Bowen, Auteur ; Jason Newton, Auteur
Type de document :	Article
Dans :	British Birds (102(12) DEC 2009)
Article en page(s) :	697-699
Résumé :	Stable-hydrogen isotope signatures of feathers from a first-winter Baikal Teal Anas formosa collected in Essex in January 1906 reveal marked differences between juvenile feathers, grown on the breeding grounds, and post-juvenile feathers, grown on the wintering grounds. The natal-area signatures were consistent with a Siberian origin and the wintering-area signatures were consistent with a west European origin. This suggests that the Essex bird originated within the normal breeding range of Baikal Teal and that its occurrence in Britain was the result of natural vagrancy.

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