Animals

Swans, genus Cygnus, are birds of the family Anatidae, which also includes 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.

A large aquatic bird living in both hemispheres, which is related to the geese and ducks. They have a long and graceful curved neck and an extremely long, convoluted trachea , which helps the bird make its far carrying calls . The orange billed and white Swan seen in parks is the mute swan, belonging to the old world origin. It breeds in the wild state in parts of the Asia, Europe, and United states.

The swans are the largest members of the duck family Anatidae, and are amongst the largest flying birds. The largest species, including the mute swan, trumpeter swan, and whooper swan, can reach length of over 1.5 m (60 inches) and weigh over 15 kg (33 pounds). Their wingspans can be almost 3 m (10 ft). Compared to the closely related geese they are much larger in size and have proportionally larger feet and necks.

They also have a patch of unfeathered skin between the eyes and bill in adults. The sexes are alike in plumage, but males are generally bigger and heavier than females.

During the breeding season it has trumpet like note, softer in the tame birds. The whistling Swan Of North America migrates from the Arctic to Mexico. Conservation extremes saved it almost from the extinction. The trumpeter swan is the largest of the species .