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) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.

Please visit Aizawa's Blog for many more pictures!

Overall brown texture on underparts, extensive dark on tail. Also hefty bill, head shape and small eye typical for this taxon. Dark juvenile tertials. Some upper scaps replaced for 2nd gen. With adult.