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 4cy July

 

grotemantel27juli2004westkapelle.jpg (35383 bytes)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.

7095jp36.jpg (66909 bytes)Great Black-backed Gull (Larus marinus) 4cy 48C July 31 2010, Boulogne / Mer, France. Picture Jean Michel Sauvage.
2137gbbgsubad.jpg (62037 bytes)Great Black-backed Gull (Larus marinus) 4CY, July 30 2014, IJmuiden, the Netherlands.
2137gbbgsubad.jpg (62037 bytes)Great Black-backed Gull (Larus marinus) sub-adult, July 30 2014, IJmuiden, the Netherlands.
2137gbbgsubad.jpg (62037 bytes)Great Black-backed Gull (Larus marinus) 4CY, July 30 2014, IJmuiden, the Netherlands.
2137gbbgsubad.jpg (62037 bytes)Great Black-backed Gull (Larus marinus) sub-adult, July 30 2014, IJmuiden, the Netherlands.
2137gbbgsubad.jpg (62037 bytes)Great Black-backed Gull (Larus marinus) sub-adult, July 30 2014, IJmuiden, the Netherlands.
2137gbbgsubad.jpg (62037 bytes)Great Black-backed Gull (Larus marinus) sub-adult, July 30 2014, IJmuiden, the Netherlands.

2137gbbgsubad.jpg (62037 bytes)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.

2137gbbgsubad.jpg (62037 bytes)Great Black-backed Gull (Larus marinus) sub-adult / 3cy? July 11 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E).