Swans are synonymous with elegance and beauty. They have long necks and big feet, and white or black feathers. They look dignified as they glide through the water. When flying, they stretch their long necks forward and flap their wings slowly.

Swans like to live in groups in lakes and swamps, mainly feeding on aquatic plants, but also on snails and mollusks. Most are monogamous and stay together for life. Courtship behavior is rich, males and females will tend to make the same movements in unison, and they will groom each other's feathers considerately. It breeds once a year, and the eggs are larger in size, such as the eggs of the whooper swans weigh more than 400 grams. Young birds are precocious. When migrating, they form in groups, but still act in small groups.

Swans are graceful in shape, with long necks, solid bodies and large feet. They are solemn when gliding in the water. When flying, they stretch their long necks and flap their wings slowly. When migrating, form a diagonal or "V"-shaped queue at a high altitude to advance. Other waterfowl are not as fast as swans, either in water or in the air.

The swan is a winter migratory bird that lives mainly in reedy lakes, reservoirs and ponds. In order to avoid the cold, white swans migrate to warm places for winter when the climate turns cold. Under normal circumstances, the white swan is extremely adaptable. No matter the scorching sun or the freezing weather, it can sleep on the grass or float on the water for a long time, and does not need to build a shed. Except for the breeding season, swans have no fixed home. They often choose a safe area on the lake surface, bend their necks, and tuck their heads in their wings to drift and sleep with the water.

The most beautiful species of swans is the black-necked swan. It is the smallest swan, and it is also very quiet. Its body shape is very similar to the whooper swan. Its black neck and the beautiful red sarcoma at the base of its mouth are its distinctive features. The warts on the forehead are very bright and developed. It has red cheeks, a bluish-gray mouth, off-white muzzles, and pink tarsus and webs. The black-necked swan is also the only swan in the world that likes to swim with its young.