Swan, Anseriforme subfamily, Anseriformes (Anseriformes) is the largest waterfowl species. Most swans are birds. Swans are elegant, long-necked, heavy, and big-footed birds. When swimming, they glide majesticly, flap their wings slowly, and stretch their necks. They migrate diagonally or in a V-shape at high altitudes, and no other waterfowl move so fast on the water or in the air. Swans feed on aquatic plants by playing in shallow waters (rather than diving). Mute swan (C. olor) and black swan (C. atratus) often place one foot on their hips when swimming or standing. The male swan, called the stick, and the female swan, called the pen, look very similar. According to legend, the swan pushes the sound from the trachea. In some species, it surrounds the sternum (such as a crane); even the smallest vocal species, the swan, often hissing, making soft snoring or sharp grunts. .

 Swans are sociable except during the breeding season. They always mate. Courtship involves dipping into the bill or face-to-face gestures. While observing the corn on the cob, the pen hatched an average of six pale, unmarked eggs on a pile of vegetation. In some species, it is his turn to reproduce. After repelling the enemy, the swan made a triumphant sound like a goose. The cubs known as cygnets look short necks and thick legs; although they can walk and swim a few hours after hatching, they are carefully taken care of for months; in some species, they ride on their mothers On the back. Immature birds have mottled gray or brown feathers for 2 years or more. Swans mature in the third or fourth year and may live for 20 years in the wild and 50 years or more in captivity.

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