Adult
Vega Gull Larus vegae
April 6th 2005 Sakawagawa-river Odawara Kanagawa Japan.

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1 Vega Gull on the left with Slaty-backed Gulls.

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Left to right: adult Vega Gull, 1w Slaty-backed Gull, 1w Vega Gull, 3w Slaty-backed Gull.