Eastern Spot-billed Duck Anas zonorhyncha, Hengsha Island, Shanghai, November. Also known as Chinese Spot-billed Duck. Breeds eastern China, winters south of Yangtze River. Common breeder, passage migrant, and winter visitor Shanghai. (Craig Brelsford)Eastern Spot-billed Duck, Cape Nanhui, Shanghai, January. Eastern Spot-billed Duck is the largest and heaviest dabbling duck. Distinguished from Indian Spot-billed Duck Anas poecilorhyncha by lower cheek bar, absent on Indian. (Craig Brelsford)
