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 June

 

9101.jpg (76303 bytes)Great Black-backed Gull (Larus marinus) 4cy, June 16 2013, Noordwijk, the Netherlands.
9101.jpg (76303 bytes)Great Black-backed Gull (Larus marinus) 4cy, June 10 2013, Noordwijk, the Netherlands.
9101.jpg (76303 bytes)Great Black-backed Gull (Larus marinus) 4cy, June 07 2013, Noordwijk, the Netherlands.

sub-adult Great Black-backed Gull in June. (56769 bytes)Great Black-backed Gull (Larus marinus) sub-adult: June 24 2003, 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: especially the bill.