Taxonomy summary
Excluding species
Eukaryota
>
Metazoa
>
Chordata
>
Aves
>
Anseriformes
>
Anatidae
>
Cygnus
Cygnus atratus
Cygnus bewickii
Cygnus buccinator
Cygnus columbianus
Cygnus cygnus
Cygnus melancoryphus
Cygnus olor
Cygnus sumnerensis
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