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) 2CY, May 27 2015, IJmuiden, the Netherlands.

Complete moult: P5-P10 old.

Rectrices old, juvenile. Strong contrast between fresh 2nd gen coverts and old juvenile feathers.