Gull Research Organisation

American Herring Gull (smithsonianus)

(last update: October 30, 2015)

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

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Slaty-backed Gull (schistisagus) 3rd cycle (4CY), March 03 2010, Shibetsu, Hokkaido, Japan. Picture: Shiroto.

Visit Shiroto's website for many more gull pictures from Japan!

Adult-like bare parts, but with much more black on the bill. 3rd gen secondaries with bold white tips. By March 3rd gen primaries can be very bleached (like in this bird) and may be misinterpreted for 2nd gen flight feathers.