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) 9M0 4th pre-basic moult (4CY), July 19 2015, Barnstable Co. MA. Picture: Amar Ayyash.

Visit Amar's BLOG: anything larus. Banded on Appledore Island, banded as pullus on July 16 2012. See website: The Gulls Of Appledore.

In complete moult: P3/P7, P4 already longer than P2. Wing-covert moult as well. 3rd basic tail, secondaries and outer primaries.