Great Black-backed Gull (Larus marinus)
(last update: July 12, 2015)
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.
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.