Common pochard ホシハジロ（星羽白)

The Common Pochard, Aythya ferina, is a medium-sized diving duck.

The adult male has a long dark bill with a grey band, a red head and neck, a black breast, red eyes and a grey back. The adult female has a brown head and body and a narrower grey bill-band. The triangular head shape is distinctive. Pochards are superficially similar to the closely related North American Redhead and Canvasback.
(wikipedia)

Japanese name: ホシハジロ（星羽白)
Chinese name: 红头潜鸭