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 alternate (2CY), May 02 2010, Ayukawa - Kinkazan, Japan. Picture: Shigenobu Aizawa.

Please visit Aizawa's Blog for many more pictures!

Alternate plumage with pale head and underparts. Old coverts and tertials bleached and very worn. Dark tones on 2nd gen scaps.