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 adult (Larus marinus) August 29 2012, IJmuiden, the Netherlands (52.27N - 04.33E).

Active complete moult, P5 fully grown (in our notation P5 is fully grown once it exceeds P4 in length, which is just the case in this individual), P8-P10 old. Small mirror on P8.