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) sub-adult, December 02 2012, Milwaukee, WI. Picture: Amar Ayyash.

Rather classic bird. Note black in tail as its taking of. Other signs of immaturity: bill colour and markings in greater primary coverts.