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 (4CY), February 19 2014, Akkeshi, Hokkaidoi, Japan.

See abcdefgewings's Flickr photostream for more pictures from Japan.

Much black on bill and many immature coverts. Still with black in tail. Adult-like central primaries and mirror on P10.