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)

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Great Black-backed Gull (Larus marinus) 2CY, August 15 2015, IJmuiden, the Netherlands.

P7/-, P8 at P6. Inner 2nd gen primaries with arrowhead pattern. New tail, old juvenile innermost secs. Note large moult gap in central secs.