pacific black duck (anas superciliosa) on a grassy ground by the lake : (pix sanjiv shukla)

pacific black duck anas superciliosa pbd dabbling grey anatidae water bird waterbird cosmopolitan distribution swimming floating sociable gregarious wetland habitats feed upend dark body paler head crown facial stripes flight green dabble speculum feathers plumage resident migration quack nest hole tree ground vegetarian seeds aquatic plants crustaceans mollusks insects plunge underwater australia zealand indonesia grassy lake