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) sub-adult, December 27 2008, IJmuiden, The Netherlands. Picture: Ton van Wijk.

Note bill pattern, especially the bale pinkish base could indicate sub-adultness.