Slaty-backed Gull – オオセグロカモメ

Slaty-backed Gull (Larus schistisagus) オオセグロカモメ
Adult Slaty-backed Gulls have all white heads at breading times.
A Slaty-backed Gull taking off in Hokkaido. Hokkaido 2007

Slaty-backed Gulls. Hokkaido 2007