Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

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.