Cygnus

Trivial name Latin name
Mute swan Cygnus olor
Black Swan Cygnus atratus
Trumpeter Swan Cygnus buccinator
Black-necked Swan Cygnus melanocoryphus
Bewick's Swan Cygnus bewickii

comparison of wing and tail configuration1

1 According to Hartmann (2000a, 2000b and 2016)