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) sub-adult: August 11 2003, Boulogne/Mer, France (50.34 N - 01.34 E).

Obvious large mirrors on both P9 and P10, but brown patterned greater coverts indicative for immaturity.