The spot-billed duck (Anas poecilorhyncha) sometimes referred to as the spotbill, is a dabbling duck which breeds in tropical and eastern Asia. It has three populations, treated here as subspecies, the Indian spot-billed duck (A. poecilorhyncha poecilorhyncha), Eastern spot-billed duck (A. poecilorhyncha zonorhyncha), and Burmese spot-billed duck (A. poecilorhyncha haringtoni). Some authors elevate the eastern population as a species, Anas zonorhyncha.