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 (2CY), December 25 2013, Shibetsu Harbor, Shibetsu, Hokkaido, Japan. Picture: Ian Davies.

Please visit Ian's Flickr Photostream for more pictures!

Upperpart grey tone shining through as the new feathers grow in. Dark iris in this bird, much dark in tail. Note overall very simple pattern on wing-coverts and tertials, lacking any notching (no post-stamp edges).