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) 3CY, August 22 2015 , IJmuiden, the Netherlands.

P7/- in right wing, old 2nd gen P10 still present in left wing. P10 with faint mirror.