The adult female is called a pen , the adult male is called a cob , and the baby is called a cygnet . Black swans are very territorial. They make honking and hissing noises. The black swan is the emblem of the State of Western Australia.
Black swans are long-necked black birds with a red beak tipped in white.
The neck is longer than the body. Males and females are similar in size. The black swan eats mostly water plants and some grain. It reaches under the water with its long neck to get these plants, and it even eats the roots. Cygnets eat a lot of bugs and other small invertebrates , since they feed mostly from the water's surface.