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) 3rd cycle (3CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.

Please visit Aizawa's Blog for many more pictures!

Upperpart grey tone as in Lesser Black-backed Gull, amber iris with speckling, pink legs. 3rd gen flight feathers: adult-like inner and central primaries, new secondaries grey base with bold white tips and more white in tail than in 2nd gen rectrices. Often mirror on new P10.