Genus: Cygnus

Systematics :

KingdomAnimals (Animalia)
Phylum Chordata
Subphylum  Vertebrata
Class   Birds (Aves)
Order    Anseriformes
Family     Anatidae
Genus      Cygnus
Species       Tundra Swan (Cygnus columbianus)
Species       Mute Swan (Cygnus olor)
Species       Whooper Swan (Cygnus cygnus)