Classification
Biota [regio]Animalia [regnum]
Chordata [phylum]
Aves [classis]
Anseriformes [ordo]
Anatidae [familia]
Cygnus [genus]
Genus Cygnus contains the following taxa:
Cygnus buccinator Richardson, 1832 [species]
Cygnus columbianus (Ord, 1815) [species]
Cygnus cygnus (Linnaeus, 1758) [species]
Cygnus olor (Gmelin, 1789) [species]