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, August 14 2016, Brouwersdam, the Netherlands.

P6/P9. S1 new, S2 growing. 2nd gen tail growing; no old juvenile tail-feathers left.