Baer's Pochard

Aythya baeri

Breeds in Eastern Asia around South East Russia & North East China.

Winters in S China, Vietnam, Japan and India.

Males have a black head and neck with green gloss, white or paler yellow eyes, blackish-brown back, dark chestnut breast, white or light chestnut flanks and a short and low tail.

While it is likely to look completely black in poor light.

Females has brown eyes and a dark brown head and neck that blend into the chestnut-brown breast and flanks.

Eclipse and First-Winter Male resembles Female, but retain the white eyes. 

Both Male and Female have wide white speculum feathers, white vent-side, dark-grey bill, black nail and dark-grey tarsometatarsus.