Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

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

Great Black-backed Gull (Larus marinus) JYY90 2CY, August 12 2015, Stellendam, the Netherlands. Picture: Merijn Loeve.

CR-Code Black ring with white code: JYY90
Ringing Centre Copenhagen (Denmark)
Species Great Black-backed Gull  Larus marinus
Sex Unknown Age Pullus

Active moult: P6/P9. P7 at P5. S1 new, S2 shed. Active moult in rectrices, R5 old juvenile, other tail-feathers growing.