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: August 2000, Boulogne sur Mer, France (50.42 N - 01.34 E).

Note the old retained outer primary p10 with a large white mirror which merges with the white tip.