La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Waders with non-breeding plumage in the breeding season
Auteurs :	R. J. Chandler, Auteur ; J. H. Marchant, Auteur
Type de document :	Article
Dans :	British Birds (94(1) January, 2001)
Article en page(s) :	28-34
Résumé :	Why do some waders not acquire breeding plumage, but apparently retain non-breeding plumage during the breeding season? With some wader species it is usual for a significant proportion, or even most of the population, not to breed in their first summer; in other cases, non-breeding-type plumage is the result of individuals being, for various possible reasons, 'unfit' to breed. Illustrations are presented of waders in such plumages, including the 1981 Frodsham, Cheshire, Stilt Sandpiper Micropalama himantopus and the 1997 Musselburgh, Lothian, Western Sandpiper Calidris mauri. In view of this phenomenon, caution should be exercised in using the lack of breeding plumage to aid wader identification.

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