Gulls in NW Europe
(last update: September 25, 2011
Herring Gull 1cy Y.AMR (argenteus) September 12 2010, IJmuiden, the Netherlands. Pictures: Maarten van Kleinwee.
Ringed as pullus on July 05 2010 at IJmuiden, The Netherlands.
First-calendar year (first cycle) European Herring Gull moulting to first-winter plumage (first prealternate moult). Some of the mantle, upper and lower scapulars have been moulted to second-generation feathers which contrast with the first-generation (juvenile) feathers.
