Falcated Duck

The Falcated Duck is a graceful East Asian dabbling duck named for the male's long, curved tertial feathers. A breeding male has a glossy green-and-purple head, white throat, dark collar, finely grey-patterned body and black-and-cream rear. Females are mottled brown and resemble female Gadwalls, but have a darker crown, stronger facial pattern and green wing speculum (Wikipedia, general species account).

Falcated Ducks use shallow marshes, lakes, slow rivers and flooded fields, feeding by dabbling for aquatic vegetation, seeds and small invertebrates. They breed across northeastern Asia and migrate south in autumn, often joining mixed flocks of other dabbling ducks. The female nests on the ground in dense vegetation near water. Japan supports important passage and wintering concentrations of the species (Wikipedia, general species account).