Great Black-backed Gull (Larus marinus)(last update: July 12, 2015) |
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Great Black-backed Gull (Larus marinus) 1cy, December 08 2007, Den Oever - Voorhaven, The Netherlands. Picture: Fred Visscher.Left bird with average moult in scapulars for 1cy December, as shown by many ringed birds from S Norway. Right bird delayed and only few scapulars replaced. |