Bangladesh, Bhutan, Cambodia, China (mainland), Hong Kong (China) (B), India, Japan, Laos, Mongolia (B), Myanmar, Nepal, North Korea (B), Pakistan, Philippines, Russia (Asian), Russia (Central Asian), South Korea, Sri Lanka, Taiwan (China), Thailand, USA, Vietnam.
Vagrant to Guam, Northern Mariana Islands.
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is 910,000 - 1,800,000 (2010).
poecilorhyncha Forster, 1781 - Throughout Indian Subcontinent and east to western Assam.
zonorhyncha Swinhoe, 1866 - South-eastern USSR, Sakhalin and Japan to southern China. Considered by some authors to be a distinct species, Chinese Spot-billed Duck (Anas zonorhyncha).
haringtoni (Oates, 1907) - Eastern Assam and Burma east to southern China and Laos.