Classification
Biota [regio]Animalia [regnum]
Chordata [phylum]
Aves [classis]
Anseriformes [ordo]
Anatidae [familia]
Cygnus [genus]
Cygnus columbianus [species]
Cygnus columbianus (Ord, 1815) contains the following taxa:
Cygnus columbianus bewickii Yarrell, 1830 [subspecies]
Cygnus columbianus columbianus (Ord, 1815) [subspecies]