2. During the breeding season, it mainly inhabits open lakes, ponds, swamps, slow-flowing rivers and adjacent tundra lowlands and tundra swamps. In winter, it mainly inhabits large lakes, reservoirs, ponds and river bends rich in aquatic plants such as reeds and cattails, and also appears in wet grasslands, flooded plains, swamps, beaches and estuaries, and sometimes even in farmland Yuan Ye.
Swan refers to the birds of the family Dayanidae. It is distributed on all continents except Africa and Antarctica. It is the largest individual group in the family Anatidae. The neck is slender, exceeding or equal to the body length; The floor of the mouth is high and the front end is flat, and the eye glands are exposed; The tail is short and round with 20-24 tail feathers; Strong webbed, but no webbed flap on the back toe.
Most of them are monogamous and stay together for life. There are many courtship behaviors, and men and women tend to make the same movements at the same time, and they will gently comb their feathers.
Extended data:
Life habits of swans:
White swan feeds on the roots, stems, leaves and seeds of aquatic plants, as well as mollusks, insects and earthworms. Smooth temperament, group activities. Daytime activities. Good at flying and swimming, able to walk on the ground. When flying, the head is extended forward and the feet are extended to the back of the abdomen. Swan has no fixed home except the breeding season, and often chooses the safe zone by the lake, bending its neck and sleeping with its head resting on its wings.
White swan is a migratory bird, mainly living in lakes, reservoirs and ponds with many reeds. In order to avoid the cold, the white swan living in Siberia migrated to the south of China for the winter when the climate became cold. Bloom will return to its hometown in April next year, and breed in Northeast China, Inner Mongolia and Xinjiang in summer.
White swans like to nest in groups. Except in summer, it can spawn and breed in other seasons, and the annual output can reach more than 20. During the breeding period, the female goose lays eggs and the male goose is responsible for guarding them. After the male and female swans hatch in turn, the cygnet emerges 35 days later. The newly hatched cygnet is gray. After a few days, it can swim in the water and eat with its parents' birds. When disturbed, it will hide under the wings of its parents.
The coat color of the cygnet gradually turns white when it is three or four months old, and it has the same size and weight as an adult swan after six months.
Baidu encyclopedia-swan