Swan And Baby Swan

Swans are birds of the family Anatidae within the genus Cygnus. The swans' close relatives include the geese and ducks. Swans are grouped with the closely related geese in the subfamily Anserinae where they form the tribe Cygnini. Sometimes, they are considered a distinct subfamily, Cygninae. There are six or seven species of swan in the genus Cygnus; in addition there is another species known as the Coscoroba Swan, although this species is no longer considered one of the true swans. Swans usually mate for life, though 'divorce' does sometimes occur, particularly following nesting failure. And if a mate dies, or is killed by a predator, the remaining mate will take up with another; however, if all goes well in the pairing, they indeed will stay together "for life." The number of eggs in each clutch ranges from three to eight.The swans are the largest members of the waterfowl family Anatidae, and are among the largest flying birds. The largest species, including the mute swan, trumpeter swan, and whooper swan, can reach a length of over 1.5 mand weigh over 15 kg  Their wingspans can be almost 3 m . Compared to the closely related geese, they are much larger and have proportionally larger feet and necks Adults also have a patch of unfeathered skin between the eyes and bill. The sexes are alike in plumage, but males are generally bigger and heavier than females.The Northern Hemisphere species of swan have pure white plumage but the Southern Hemisphere species are mixed black and white. The Australian Black Swan  is completely black except for the white flight feathers on its wings; the chicks of black swans are light grey. The South American Black-necked Swan has a white body with a black neck.

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