Cygnus columbianus bewickii Yarrell, 1830

Classification

Biota [regio]
Animalia [regnum]
Chordata [phylum]
Aves [classis]
Anseriformes [ordo]
Anatidae [familia]
Cygnus [genus]
Cygnus columbianus [species]
Cygnus columbianus bewickii [subspecies]