Trumpeter swan
( Cygnus c. buccinator )
  

Whisling swan
( Cygnus c. columbianus )
  

Whooper
( Cygnus c. cygnus )
  
 
 

Bewick's swan
( Cygnus c. bewickii )
  

Mute swan
( Cygnus olor )
  

Black swan
( Cygnus atratus )
  
 
 

Black-necked swan
( Cygnus melanocoryphus )
  

Coscoroba swan
( Coscoroba coscoroba )
  
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