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)

Great Black-backed Gull (Larus marinus), April 15 2001, IJmuiden, the Netherlands (52.27 N, 4.33 E).

Recent replaced feathers are more adult-like in the blackish base and undefined pattern. Note the tail pattern.