American Herring Gull (smithsonianus)
(last update: October 30, 2015)
Vega Gull (vegae) 1st cycle (2CY), January 31 2010, Choshi, Japan. Picture: Gullog.
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1st gen flight feathers. Atypical bird in a European context, with no notching on tertials (and tertials darkest part of bird together with visible primaries like in cachinnans) and very simple pattern on 2nd gen scaps.
Wing-coverts and tertials juvenile. Scap moult: US=75-99%, LS=25-50%, TOT SCAPS=50-75%.