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)

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Great Black-backed Gull (Larus marinus) 3cy, September 23 2011, Scheveningen, The Netherlands.

Bird in last stage of complete moult: P7 / -. Moult gap in central gc closed. Note more adult-like bill, but still many new wing-coverts and tertial #4 obviously barred.