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, September 03 2013, Stratford, CT, USA. Picture: Donna Rae Henault Caporaso.

In many respects adult-like, including old outer primaries, but note small black line on greater primary coverts and one black spot just visible on centre of secondary (secondaries exposed, now the greater coverts have been dropped).