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) 3cy, September 24 2004, Scheveningen, the Netherlands.

P7 fully grown and P10 still old. Note the small mirror on the this second generation P10 and the complete fresh white tail in combination with the very immature wing-coverts.