Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)
Coordinators:
Jean-Michel Sauvage (France)
Morten Helberg (Norway)
Nils Helge Lorentzen (Norway)
Mars Muusse (Netherlands)

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Great Black-backed Gull (Larus marinus) sub-adult, February 24 2016, IJmuiden, the Netherlands.

Brown pattern on primary coverts, broad band on bill and some black in tail, otherwise adult-like. Probably 5CY bird.