American Herring Gull (smithsonianus)

(last update: October 30, 2015)

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

American Herring Gull (smithsonianus) 4cy (3rd cycle), February 29 2008, Dryden, NY, USA. Picture: Mike.

See Mike's Picasa website for many more taxa and images of American Herring Gull.

Obvious immature characters. Combination of grey inner primaries, black sub-terminal bands on central primaries and rather small completely enclosed mirror on P10 advocate 3cy (3rd cycle). Limited dark in tail, yet deep blackish not brown.