'Taimyrensis'-type Gull (heuglini-vegae intergrade?)
October 24th 2004  Sakawagawa-river Odawara Kanagawa Japan 

The mantle was slightly darker than average vegae, but was paler than Black-tailed Gulls

Note the yellow legs, old primaries, large red bill spot.

A different individual

The legs were yellowish.

Same individual (left) with a Vega Gull (right)
Note their mantle color and molt-timing. The taimyrensis-type still has old P10-P6. The Vega Gull has old P10-P8.

The P4 has a small black marking.