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

(last update: December 2015)

Kim Seog-min (South Korea)
Hideo Shimura (Japan)
Peter Adriaens (Belgium)
Mars Muusse (Netherlands)

Slaty-backed Gull (schistisagus) 2nd cycle (2CY), October 12 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.

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End of the complete moult. 2nd gen flight feathers: outer primaries with rounded tips, narrow white tips on 2nd gen secondaries and much dark in rectrices. Pale iris and pale pink base to bill. Older scapulars start to bleach, with narrow dark shaft streak. Scapulars and coverts with simple pattern, lacking obvious notching (no post-stamp pattern on fringes of the coverts; coverts with wedge-shaped dark centres), just some fine lining on the inner GC.