Greater Mergansers (Mergus) is a genus of bird (Aves) in the family Anatidae (Ducks, Geese, and Waterfowl).
Mergus australis
Mergus octosetaceus
Mergus merganser
Mergus serrator
Mergus squamatus
Anser
Branta
Aythya
Plectropterus
Amazonetta
Rhodonessa
Chloephaga
Marmaronetta
Salvadorina
Thalassornis
Stictonetta
Pteronetta
Malacorhynchus
Nettapus
Hymenolaimus
Coscoroba
Chenonetta
Speculanas
Sibirionetta
Cyanochen
Lophonetta
Oressochen
Callonetta
Heteronetta
Merganetta
Tachyeres
Cereopsis
Sarkidiornis
Alopochen
Asarcornis
Bucephala
Mergus
Histrionicus
Lophodytes
Camptorhynchus
Clangula
Melanitta
Mergellus
Polysticta
Oxyura
Somateria
Dendrocygna