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 September

 

jtu1.jpg (87790 bytes)Great Black-backed Gull (Larus marinus) JTU1 near-adult: September 24 2004, IJmuiden, the Netherlands (52.27 N - 04.33 E).
Primary p7 fully grown. Ringed in Norway.

gbbgGreat Black-backed Gull (Larus marinus) 4cy JH3C September 24 2007, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
8471j52c.jpg (85052 bytes)Great Black-backed Gull (Larus marinus) 4cy J9RJ September 10 2009, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
8471j52c.jpg (85052 bytes)Great Black-backed Gull (Larus marinus) 4cy JZ84 September 10 2010, Westkapelle, the Netherlands.
8471j52c.jpg (85052 bytes)Great Black-backed Gull (Larus marinus) 4cy TC7.T September 10 2011, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
8011gbbg9158322.jpg (90352 bytes)Great Black-backed Gull (Larus marinus) 3CY-4CY DKC 3092175 2012 & 2013, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

4wmarsep01.jpg (27929 bytes)Great Black-backed Gull (Larus marinus) sub-adult: September 2000, Brouwersdam, the Netherlands (51.45 N, 3.51 E).
Primary p7 fully grown and p10 still present.

6233.jpg (70457 bytes)Great Black-backed Gull (Larus marinus) sub-adult: September 17 2001, Vuurtorenvlakte, Maasvlakte, the Netherlands (51.59 N - 04.01 E).
Primary p5 fully grown and p9-p10 still present.

6445.jpg (67736 bytes)Great Black-backed Gull (Larus marinus) sub-adult: September 30 2001, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E).
Primary p9 almost fully grown and no old primaries left. Note the variegated pattern in the central tertial, faded brown greater and lesser coverts and the well-developed bill-band.