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 (L. marinus) 2Y4 2nd pre-basic moult (2CY), August 12 2015, Race Point - Hatches Harbor, Provincetown, Barnstable County, Massachusetts. Picture: Steve Arena.

Please visit Steve's Flick photostream excellent website for many more images! Banded as pullus on July 15 2014, near Portsmouth, York County, Maine USA. For more info about this project, see The Gulls Of Appledore blog.

Last stage of complete moult: P9-P10 old juvenile primaries, P1-P6 new 2nd gen primaries. New 2nd gen tail growing in.