Black-neck swan (scientific name: Cygnus melancoryphus): is a South American-born swan. Body posture is very similar to the big swan, is a rare bird, usually about 1 meter in length, its black neck and base of the mouth that beautiful red sarcoma has become a significant feature of it. Warts on the forehead, very bright and well developed. Its cheeks are red, mouth is blue-gray, mouth a gray, tarsus and webbed are pink.

Like living in the presence of narrow leaf cattail, banana grass, rushes, reeds, duckweed and other aquatic plants fresh water or slightly saline swamp, lakes and lagoons. The Black-necked Swan is also the only swan in the world who likes to swim with their young birds. Breeding in South America Paraguay, Uruguay, Chile, Argentina, and Tierra del Fuego and Falkland Islands and other places.