Slaty-backed Gull (schistisagus) / オオセグロカモメ / 큰재갈매기

(last update: December 2015)
Coordinators:
Kim Seog-min (South Korea)
Hideo Shimura (Japan)
Peter Adriaens (Belgium)
Mars Muusse (Netherlands)

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Slaty-backed Gull (schistisagus) adult, July 2008, Meynypilgyno, Chukotka, Russia. Picture: Sergey Golubev.

Bird in complete moult, indicated by missing coverts. Mid-summer most of the retained feathers abraded at the tips.