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Species Encyclopedia: Mute Swan

Time:2022-11-29 18:41:46 author:Fish Read:673次
Species Encyclopedia: Mute Swan

The mute swan, also known as the tumor-nosed swan and the mute swan, belongs to the genus of the Anseriformes Anatidae, and has no subspecies differentiation. The neck is slender and the forehead has a protrusion of a wart, hence the name "Mute Swan". Distributed in Europe, North Africa, central and southern Asia. Breeds in the British Isles, north-central Europe and north-central Asia, overwintering as far south as North Africa, the Near East, India and the Korean Peninsula. It has been successfully introduced into North America, where it is a widespread species. Inhabits lakes, estuaries, ponds, and slow-flowing rivers that are rich in aquatic plants. It is a second-class protected animal in China. The body length is 120-150 cm and the weight is 6.7-10 kg. The plumage is white, and the top of the head to the pillow is slightly stained with light brown. The neck is slender, exceeding or equaling the length of the body. When swimming in water, the neck is curved and slightly "S" shaped. The base of the mouth and the margin of the mouth are black, the rest of the mouth is orange-red, the front end is slightly lighter, and the beak is brown. There are prominent black warts on the forehead, the warts are larger in males, and less developed in females. Iris brown, tarsus, webs, claws black. It is clumsy to walk on the ground, but very good at swimming. When flying, it straightens its head, but rarely makes a sound, so it is also named "silent swan". Often in pairs or in families, sometimes in large flocks, especially during winter and moulting. It is docile and timid, and moves extremely cautiously, often swimming and foraging in the open center of the lake. Swim very fast and can paddle with one foot or both feet at the same time. When taking off, the wings flap on the water surface, and then run about 50 meters on the water surface to slowly fly away from the water. When flying, the neck is stretched forward, the feet are stretched back, and the wings are flapped slowly and powerfully. It mainly feeds on leaves, roots, stems, buds and fruits of aquatic plants, and also eats algae and small aquatic animals. They migrate to the south for winter from the end of September to mid-October, and most of them migrate north in mid-to-late February in spring. They all migrate in small groups and family groups, mostly along lakes, rivers and other waters, and stop along the way. In some places, especially those where it was introduced, such as North America, South Africa, Australia and New Zealand, the mute swan has become a resident bird and no longer migrates. But the mute swans, which breed in Siberia, Mongolia and northern China, make long-distance back-and-forth migrations between their breeding grounds and their wintering grounds every spring and autumn. The breeding season is from March to May, with 4-9 eggs per litter, and the hatching is mainly borne by the female birds.


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