American Herring Gull (smithsonianus)

(last update: October 30, 2015)

Coordinators:
Amar Ayyash (US)
Bruce Mactavish (Canada)
Dave Brown (Canada)
Mars Muusse (Netherlands)

Slaty-backed Gull (schistisagus) 3rd cycle, January 02 2010, Choshi, Japan. Picture: Chris Gibbins.

Please visit Chris's Blog for many more pictures! 3rd cycle bird (adult-like secondaries, sharply demarcated mirror on P10, largely white tail, all-grey scaps saddle) has a clean iris.