American Herring Gull (smithsonianus)

(last update: October 30, 2015)

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

American Herring Gull (smithsonianus) adult, November 05 2011, Chicago IL, USA. Picture: Amar Ayyash.

Plain grey greater primary coverts indicate full adult. Note short grey tongue on P10, no mirror on P9 and black on outerweb of P4.