American Herring Gull (smithsonianus)

(last update: October 30, 2015)
Coordinators:
Amar Ayyash (US)
Bruce Mactavish (Canada)
Dave Brown (Canada)
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.