Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

American Herring Gull smithsonianus 3rd cycle (4CY), April 15 2012, Offshore NY/NJ. Picture: Benjamin van Doren.

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Adult-like grey inner primaries, central primaries with sharp blackish sub-terminal band and mirror on P10 in combination with many immature markings in coverts and tail.