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) adult, September 23 2011, Scheveningen, The Netherlands.

Bird in active complete moult: P8-P10 still old. Central gc missing, exposing secondaries underneath.