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), September 15 2009, Nemuro, Hokkaido, Japan. Picture: Hannu Huhtinen.

Juvenile plumage. Much dark in tail and already overall 'washed-out' mud-brown impression, however, by September white fringes on scapulars still present. Note densely streaked undertail coverts.