Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

Great Black-backed Gull (Larus marinus) 2cy: October 05 2003, IJmuiden, the Netherlands (52.27 N - 04.33 E).

Primary P10 almost fully grown. The partial autumn moult includes many of the median coverts, the inner greater coverts and the upper tertials, which are all fresh again.