鴨

black scoter (duck)

mallard (Anas platyrhynchos); mallard duck

Eurasian wigeon (Anas penelope)

spot-billed duck (Anas poecilorhyncha)

harlequin duck (Clangula hyemalis or Histrionicus histrionicus)

falcated teal

greater scaup (species of diving duck, Aythya marila)

Baikal teal (species of dabbling duck, Anas formosa)

Falkland steamer duck (Tachyeres brachypterus)

long-tailed duck (Clangula hyemalis); old-squaw; hareld; old injun; oldwife

common goldeneye (species of duck, Bucephala clangula)

common shelduck (Tadorna tadorna)

northern shoveler (species of duck, Anas clypeata); northern shoveller

gadwall (Anas strepera)

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

Auckland teal (Anas aucklandica); Auckland Islands teal

ruddy shelduck (Tadorna ferruginea); ruddy sheldrake

Anseriformes (order of swimming birds)

duck-billed dinosaur; hadrosaur

Anatidae (family of birds including ducks, geese and swans)

Idiomatic expression

ugly duckling

Rare term

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