American Herring Gull (smithsonianus)
(last update: October 30, 2015)
American Herring Gull (smithsonianus) sub-adult, May 20 2013, Appledore Island, ME. Picture: Shailee Shah.
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Long pale tongue on P10, yet with broad full sub-terminal band. Pattern repated on P9. Black on P9 reaches primary coverts. 'Bayonet' pattern on P6, P7 and P8 (ill pattern). W-shape on P5 and spot on P4.
Small black spots on primary coverts probably indicate 4th / 5th cycle bird.