Cygnets, Young Swans

The Northern Hemisphere species swan have pure white plumage but the Southern Hemisphere species are mixed black and white. The Australian Black Swan (Cygnus atratus) is completely black except for the white flight feathers on its wings; the chicks black swans are light grey in colour, and the South American Black-necked Swan has a black neck.
The legs swans are normally a dark blackish grey colour, except for the two South American species, which have pink legs. Bill colour varies: the four subarctic species have black bills with varying amounts yellow, and all the others are patterned red and black, although most birds generally do not have teeth, swans are known to be an exception to this having small jagged 'teeth' as part their beaks used for catching and eating fish. The Mute Swan and Black-necked Swan have a lump at the base the bill on the upper mandible.