Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

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

Great Black-backed Gull (Larus marinus) adult: September 30 2001, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E).

Primary p5 is fully grown. Outer primaries p9-p10 still have to be shed. The innermost greater coverts have been replaced and the outer greater coverts are growing in a descendant order (towards the body).