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) adult, December 15 2012, IJmuiden, The Netherlands.

P9 growing, P10 old. PMS=41/42. Late moult. Suggestion of growing S2? Lots of brown old coverts in wing.