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) 4th cycle (5CY), March 13 2010, Nemuro, Hokkaido, Japan. Picture: Shiroto.

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

Overall adult-like bird with white tail, large mirror on P10 and adult-like upperparts. Only feature is much black on bill, but may be present anyway in (only younger?) adults. Speckled iris, pink legs, bold tertial crescents. Like adults, this bird has red gonys spot.