Gulls in NW Europe
(last update: September 25, 2011
Great Black-backed Gull (marinus) 2cy JP241 May 30 2012, Boulogne-sur-Mer, NW France. Picture: Jean-Michel Sauvage.
Ringed as pullus at Hummerholmen, Lindesnes, Vest-Agder, Norway (58°01'04"N 007°16'14"E); pullus ringed on 06 July 2011. First observation at Boulogne sur Mer.
Complete moult started, note new wing-coverts with buffish base, while old juvenile feather are worn at the tips and are pale parts are bleached, white.
