Gull Research Organisation

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) gbbg rings gbbg PDF's gbbg 1cy August gbbg 1cy September gbbg 1cy October gbbg 1cy November gbbg 1cy December gbbg 2cy January gbbg 2cy February gbbg 2cy March gbbg 2cy April gbbg 2cy May gbbg 2cy June gbbg 2cy July gbbg 2cy August gbbg 2cy September gbbg 2cy October gbbg 2cy November gbbg 2cy December gbbg 3cy January gbbg 3cy February gbbg 3cy March gbbg 3cy April gbbg 3cy May gbbg 3cy June gbbg 3cy July gbbg 3cy August gbbg 3cy September gbbg 3cy October gbbg 3cy November gbbg 3cy December gbbg sub-ad January gbbg sub-ad February gbbg sub-ad March gbbg sub-ad April gbbg sub-ad May gbbg sub-ad June gbbg sub-ad July gbbg sub-ad August gbbg sub-ad September gbbg sub-ad October gbbg sub-ad November gbbg sub-ad December gbbg ad January gbbg ad February gbbg ad March gbbg ad April gbbg ad May gbbg ad June gbbg ad July gbbg ad August gbbg ad September gbbg ad October gbbg ad November gbbg ad December	Great Black-backed Gull 4cy July Under construction	*Great Black-backed Gull (Larus marinus) 4cy E703* July 27 2004, Westkapelle, the Netherlands. Ringed in 2001, isle of Terschelling, the Netherlands. P7-P10 old. Picture by Jaco Walhout.
		*Great Black-backed Gull (Larus marinus) 4cy 48C* July 31 2010, Boulogne / Mer, France. Picture Jean Michel Sauvage.
		*Great Black-backed Gull (Larus marinus) sub-adult:* July 11 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). Ageing GBBG may be difficult in sub-adult plumages, but some clues can be found in this bird.
		*Great Black-backed Gull (Larus marinus) sub-adult / 3cy?* July 11 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E).

Great Black-backed Gull (Larus marinus)

Great Black-backed Gull 4cy July