Great Black-backed Gull (Larus marinus)

(last update: October 12, 2011)

Coordinators:
Jean-Michel Sauvage (France)
Morten Helberg (Norway)
Nils Helge Lorentzen (Norway)
Mars Muusse (Netherlands)

Great Black-backed Gull 2cy July

 

8210.jpg (74296 bytes)Great Black-backed Gull (Larus marinus) 2y CZD July 07 2009, Boulogne / Mer, France.
gbbg Great Larus marinus) 2cy JW068 July 01 2011, IJmuiden, the Netherlands.
9101.jpg (76303 bytes)Great Black-backed Gull (Larus marinus) 5T9 1cy-3cy, August 27 2011 - June 29 2013, Sandy Point - Plum Island, Ipswich, MA. 
9101.jpg (76303 bytes)Great Black-backed Gull (Larus marinus) 2cy, July 09 2013, Katwijk, the Netherlands.
2118gbbg2cy.jpg (62823 bytes)Great Black-backed Gull (Larus marinus) 2cy: July 11 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). Primary moult stage: p5 is fully grown and p9 is missing. 
2128gbbg2cy.jpg (76384 bytes)Great Black-backed Gull (Larus marinus) 2cy: July 11 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). An individual with all wing-coverts moulted to second generation. This bird is moulting the rectrices. P9 and P10 are still juvenile. P6 is fully grown. The soft parts are very immature with the bill mostly black.
2129gbbg2cy.jpg (54633 bytes)Great Black-backed Gull (Larus marinus) 2cy: July 11 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). Most of the wing-coverts have been replaced for second generation feathers. An advanced bird regarding plumage moult. Soft parts still very immature, juvenile-like.