Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

Coordinators:
Jean-Michel Sauvage (France)
Morten Helberg (Norway)
Nils Helge Lorentzen (Norway)
Mars Muusse (Netherlands)

Great Black-backed Gull (Larus marinus) adult: October 20 2003, IJmuiden, the Netherlands (52.27 N - 04.33 E).

Primary P6 fully grown and P9-P10 still old. Central greater coverts and lower tertials still growing. Most other wing-coverts and upper tertials fresh.