La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Occurrence of White-billed Divers Gavia adamsii in the German Baltic Sea
Auteurs :	Jochen Bellebaum, Auteur ; Christoph Bock, Auteur ; Stefan Garthe, Auteur ; Jan Kube, Auteur ; Marco Schilz, Auteur ; Nicole Sonntag, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (131(3) 2010)
Article en page(s) :	179-184
Résumé :	Standardised seabird surveys from ships and systematic counts of migrating birds in the German Baltic Sea from 2002 to 2008 revealed a regular occurrence of White-billed Divers mainly on spring migration (March to May). Migration intensity was 0.018 birds per hour in spring 2003 at the Darsser Ort (Mecklenburg-Vorpommern). Birds were also recorded at sea far from the German coast in the Pomeranian Bight in winter and spring. Our observations suggest that small numbers of White-billed Divers stopover or winter in offshore areas of the southern Baltic and that some birds wintering in the North Sea perform a loop migration through the Baltic in spring. Both migration and wintering mainly applies to immature birds.

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