Gulls in NW Europe
(last update: September 25, 2011
Great Black-backed Gull 2cy (marinus) JW178 March 04 2011, IJmuiden, the Netherlands.
Bird ringed as pullus 30 June 2010 at Græsholm, Hirsholmene, Frederikshavn, Nordjylland, Denmark (57°29'32"N 010°36'30"E).
Upper scapulars replaced, but otherwise retained juvenile.
