South-eastern USSR, Sakhalin and Japan to southern China. Considered by some authors to be a subspecies of Indian Spot-billed Duck (Anas poecilorhyncha).
Eastern Spot-billed Duck (Anas zonorhyncha) [XC414279]
by Frank Lambert from Elsen Tasarkhai wetland, Tariat, Arkhangai, Mongolia (call)
Eastern Spot-billed Duck (Anas zonorhyncha) [XC803918]
by Bo Shunqi \u8584\u987a\u5947 from Dongtan Nature Reserve, Chongming Island,Shanghai, China (call)
Subspecies
Considered by some authors to be a subspecies of Indian Spot-billed Duck (Anas poecilorhyncha).