Adult winter Heuglin's Gull Larus heuglini taimyrensis and taimyrensis /vegae intergrade
Choshi Chiba Japan
ad.winter taimyrensis 
Note the dark gray upperparts, 
yellow tinged with pink legs , 
typical head and bill shape for taimyrensis
near end of complete moult 
(P10 not yet fully grown), 
February 3rd 2001
fig.1
fig.2
Note the little head-streaking, gray of upperparts matching that of vegae or slightly darker, 
primary moult is late(P9, P10 not yet fully grown)
fig.1 January 6th 2001,  fig.2 February 3rd 2001
Note the medium gray upperparts, close to birulai
pale yellow legs, P10 not yet fully grown
January 6th 2001
Note the medium gray upperparts, close to vegae,
yellow legs, primary moult is late
January 6th 2001
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