Cygnus atratus - Wikipedia

Mute swan - Wikipedia

File:Cygnus atratus JPG1.jpg - Wikipedia

Black Swan Lake Marnix's Bird Gallery

File:Cygnus atratus Mulgo.jpeg - Wikipedia

Do black swans exist? Why? - Quora

File:Black Swan Cygnus atratus at Hyde Park, London.JPG - Wikimedia Commons

Krishnadas Mallya Photography

File:Black Swan.(Cygnus atratus) (28587654262).jpg - Wikimedia Commons

Série com o Cisne-Negro (Cygnus atratus) - Series with the…