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) 3CY, March 02 2015, IJmuiden, the Netherlands.

Small tips on primaries, weak mirror on P10, much lining on secondaries and lower tertials.