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) 2nd cycle (3CY), February 17 2014, Choshi, Chiba, Japan. Picture: Shiroto.

Visit Shiroto's website for many more gull pictures from Japan!

Some scapulars show the adult upperpart grey tone, which is as in Lesser Black-backed Gull. Tail largely dark and rump is white. Pale iris and faded brown 2nd gen primaries. 2nd gen secondaries with only narrow white tips.