| sub-adult: October | 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.
 |  | 
						
							| Great
      Black-backed Gull (Larus marinus) 4cy JE4H October 05 2006, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage. |  | 
						
							| Great
      Black-backed Gull (Larus marinus) sub-adult: October 01 2001,
      Le Portel - Boulogne sur Mer, France (50.42 N - 01.34
      E). Primary p6 fully grown and p10 still
      not shed.
 |  | 
  
    | 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.
 |  | 
  
    | 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.
 |  | 
  
    | 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.
 |  | 
  
    |  |  |