Great Black-backed Gull (Larus marinus)(last update: July 12, 2015) |
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Great Black-backed Gull (Larus marinus) NOS 360820 November 25 2006 & September 11 2011, Boulogne-sur-Mer, N France.A Norwegian bird with some wing-coverts replaced in the partial autumn moult: all visible median coverts, 3 inner greater coverts and some lower lesser coverts. History: below: NOS 360820 2cy, November 25 2006, Boulogne-sur-Mer. Note relatively fresh mc, inner gc and upper tertials, common pattern from the partial autumn moult. below: NOS 360820 7cy, September 11 2011, Boulogne-sur-Mer. P5 / P8. |