What is Swan?
{{Taxobox | name = Swans | image = SwansCygnus olor.jpg | image_width = 256px | image_caption = [[Mute swan]]s (''Cygnus olor'') | regnum = [[Animal]]ia | phylum = [[Chordate|Chordata]] | classis = [[bird|Aves]] | ordo = [[Anseriformes]] | familia = [[Anatidae]] | subfamilia = [[Anserinae]] | genus = '''''Cygnus''''' | subdivision_ranks = [[Species]]}} A '''swan''' (''Cygnini'') is a kind of water [[bird]], from the [[genus|genera]] ''Cygnus'' and ''Coscoroba''. They are in the [[subfamily]] Anserinae, in the [[family (biology)|family]] [[Anatidae]], which also includes [[goose|geese]] and [[duck]]s. Many swans live in colder places, such as northern [[Europe]], [[Asia]] and [[North America]]. They live on [[water]]. They swim on top of the water and eat [[plant]]s off the bottom of [[pond]]s, [[lake]]s, or [[ocean]]s. They also eat [[insect]]s and other small [[animal]]s. A baby swan is called a cygnet. Swans are tough, strong birds who will stand no nonsense from dogs or cats. They may open their wings as a warning, but from then on a person is advised to keep clear. Swans are highly protective of their nests. They will attack anything they see as a threat to their chicks, including humans. == Description == The swans are some of the largest [[flying]] birds. They are large in size and have large feet and long necks. The males are usually bigger and heavier than females. The [[mute swan]], [[trumpeter swan]], and [[whooper swan]] are the largest swans. They can be over 1.5m (60 inches) long. They can weigh over 15kg (33 pounds). Their [[wingspan]]s (this means the length of both wings) can be almost 3m (10 ft). Most swans are white. They are found in the [[Northern Hemisphere]]. This means they are found in [[Europe]], [[Asia]] and [[North America]]. However, the [[black swan]] is black with a red [[beak]]. It lives in [[Australia]]. The black necked swan has white flight feathers, and black outer feathers. It lives in [[South America]]. They also have a small area of skin between the eyes and beak that