Great Black-backed Gull (Larus marinus)

(last update: October 12, 2011)

Coordinators:
Jean-Michel Sauvage (France)
Morten Helberg (Norway)
Nils Helge Lorentzen (Norway)
Mars Muusse (Netherlands)

Great Black-backed Gull (Larus marinus) adult: February 09 2003, Le Portel / Boulogne-sur-Mer, France (50.42N,1.34E).

Some adults show a faint black sub-terminal ring on the bill. Note that the primary coverts and all other feather tracts are typical adult.