1st winter/summer Kumlien's Gull Larus glaucoides kumlieni

Comparison with 2w Vega Gull.

Note the whitish primaries than 1w Thayer's Gull.

Note the smaller bady size than Adult Vega Gulls.

Note the paler tail band than same season 1w Thayer's Gull.

With Ad summer Vega Gulls.

With Ad Black-tailed Gull.

From Otaru Hokkaido Japan. April 13.