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 22 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E).

Primary p6 is fully grown. Outer primaries p9-p10 still have to be shed. Almost all the greater coverts have been shed, exposing the secondaries underneath. The median and lower lesser coverts are growing and the upper row of lesser coverts are clearly old and brown.