La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Glaucous-winged Gull in Gloucestershire: new to Britain
Auteurs :	John Sanders, Auteur
Type de document :	Article
Dans :	British Birds (103(1) JAN 2010)
Article en page(s) :	53-58
Résumé :	During a visit to record colour-ringed gulls at Gloucester Landfill Site, near Hempsted, Gloucestershire, on 15th December 2006, an unfamiliar gull was discovered. Photographs suggested that it most closely resembled Glaucous-winged Gull Larus glaucescens. During cannon-netting operations the following day, the gull was captured; measurements and photographs established that it was a third-winter Glaucous-winged Gull. This identification was further supported by comments from observers familiar with the species in North America, and by DNA analysis. The bird was relocated at Ferryside, Carmarthenshire, where it was seen intermittently between 2nd and 5th March 2007, then at Beddington Sewage Farm, Surrey, on 18th April 2007, after briefly reappearing at Gloucester Landfill Site on 16th-17th March. Other records in the Western Palearctic and the species' distribution in the North Pacific are discussed.

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