Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Common Gull kamtschatschensis adult, March 13 2010, Choshi, Japan. Picture: Goodhilda.

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Largest of the Common Gull subspecies, sloped forehead and longer bill may suggest Herring Gull at first glance, but Common Gull never develop a red gonys spot. No black band on the bill. Note deep pale tongue on P8 (about 75%); and tongue on P9 about 50% of feather length, measured from coverts.