Herring Gull (argentatus & argenteus)(last update: February 11, 2013) |
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Herring Gull (argenteus) FXAM 5CY (4th cycle), March 05 2010, Koksijde, Belgium. Picture: Peter Adriaens.Ringed as pullus in 2006 at Zeebrugge, Belgium. Dark centres on lesser primary coverts. Otherwise, no signs of immaturity. |