'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.