La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Large light-backed gulls Larus spec. in Belarus - status and problems
Auteurs :	Nikolay Yakovets, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (127(1) 2006)
Article en page(s) :	23-30
Résumé :	'Large light-backed culls' have been regular breeders in Belarus since 1982. In the northern part of the country Herring Gulls Larus argentatus dominate clearly, often showing yellow legs (omissus-phenotype). Nowadays, Caspian Gulls L. cachinnans breed in the south of Belarus. Their occurrence and expansion into the northern and central part (single pairs and mixed pairs with Herring Gull) is assumed, but not proven yet. There is some indication that the Yellow-legged Gull Larus michahellis may also be involved especially in the south of the country. This situation is rather similar to that in interior Poland and eastern Germany. where Caspian Gulls are currently expanding enormously in range and numbers. However. further information is necessary to get a detailed overview about occurrence of the various taxa and their hybridisation in the whole country of Belarus, where a new contact zone between two (or three ?) species of gulls has apparently formed recently.

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