A-Z Animals
A Z Animals: Animal Facts: Swan (Cygnus Atratus)
This entry identifies the defining characteristics of the Cygnus Atratus, more commonly known as the swan.
Encyclopedia of Life
Encyclopedia of Life: Black Swan
The Encyclopedia of Life presents this in-depth overview of Black Swans (Cygnus atratus), including their habitats, size, conservation status, and much more. Images of this species and maps of its global distribution can also be found here.