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), 2CY, September 24 2015, IJmuiden, the Netherlands.

Small diffuse, but obvious mirror on P10. Most MC missing in partial autumn moult.