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 October

Fourth-winter as adult but often with narrower white tip to P10 (usually broken by blackish subterminal markings near tip) and more extensive dark markings on bill; tail sometimes with a few dark-patterned feathers. Primary coverts darker than in adult. Subsequent plumage as adult, but ‘immature’ features such as dark markings on bill and tail and immature-type wing-coverts (especially dark tips to under primary coverts) probably persist into higher ages than in other large gulls. (Malling Olsen, K. & Larsson, H. 2004  Gulls of Europe, Asia and North America. London: Christopher Helm).

 

jtv5wk281004.jpg (97894 bytes)Great Black-backed Gull (Larus marinus) 4cy JTV5 October 10 2004, Westkapelle, the Netherlands (51.33N - 03.25E).
Primary p7 fully grown and no old primaries left. Note the variegated pattern in the lower tertial. Ringed in summer 2001. Picture Pim Wolf.

gbbgGreat Black-backed Gull (Larus marinus) 4cy JH7P October 01 & 20 2008, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

gbbgGreat Black-backed Gull (Larus marinus) 4cy JE4H October 05 2006, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

gbbgGreat Black-backed Gull (Larus marinus) 4cy JE62 October 15 2008, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
jtv5wk281004.jpg (97894 bytes)Great Black-backed Gull (Larus marinus) 4cy J9RV October 06 2009, Westkapelle, the Netherlands.
gbbgGreat Black-backed Gull (Larus marinus) JA725 September 2009 & October 2012, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
gbbgGreat Black-backed Gull (Larus marinus) 3cy-4cy JE410 August 2011 & October 2012, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
gbbgGreat Black-backed Gull (Larus marinus) 4cy JE446 October & November 2012, Boulogne sur Mer, France (50.44 N - 01.35 E).  Picture Jean-Michel Sauvage.
8011gbbg9158322.jpg (90352 bytes)Great Black-backed Gull (Larus marinus) JE580 August 2012 & October 2013, Boulogne sur Mer, France. 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.
8011gbbg9158322.jpg (90352 bytes)Great Black-backed Gull (Larus marinus) 3CY-4CY DKC 3092175 2012 & 2013, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

6867.jpg (63330 bytes)Great Black-backed Gull (Larus marinus) CMK4 4cy, October 01 & November 26 2008, Niechorze, N. Poland. Picture: Piotr Zientek.

6861.jpg (78118 bytes)Great Black-backed Gull (Larus marinus) sub-adult: October 01 2001, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E).
Primary p7 fully grown and no old primaries left. Note the variegated pattern in the lower tertial.

6865.jpg (56476 bytes)Great Black-backed Gull (Larus marinus) sub-adult: October 01 2001, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E).
Primary p8 fully grown and no old primaries left.

6866.jpg (73773 bytes)Great Black-backed Gull (Larus marinus) sub-adult: October 01 2001, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E).
Primary p8 fully grown.