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) 2cy, February 18 2007, IJmuiden, The Netherlands.

US: 75-99%, LS: 50-75%, TOT SCAPS: 50-75%.
Wing-coverts and tertials still juvenile.