鴨 - wild duck, easy mark

duck

domestic duck

greater scaup (species of diving duck, Aythya marila)

any duck with white specula (bright patches on the wings)

noodles with duck meat and Welsh onions

Falkland steamer duck (Tachyeres brachypterus)

along comes a sucker just begging to be parted from his money; a duck comes carrying a Welsh onion on its back

common scoter (Melanitta nigra); black scoter (Melanitta americana)

northern pintail (Anas acuta)

Fuegian steamer duck (Tachyeres pteneres); Magellanic flightless steamer duck

Auckland teal (Anas aucklandica); Auckland Islands teal

harlequin duck (Clangula hyemalis or Histrionicus histrionicus)