What is the suitable environment for swans?

Swan adapts to 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 with aquatic plants such as reeds and cattails, and also appears in wet grasslands and flooded plains, swamps, beaches and estuaries, and sometimes even in farmland Yuan Ye.

Swan refers to a bird of the genus Cygnus. * * * There are 7 species, which belong to swimming birds. 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. Like to live in groups in lakes and swamps, mainly feeding on aquatic plants, but also eating snails and mollusks.

Swan has wild species or subspecies on all continents except Africa. Four kinds of white swans are distributed in the northern hemisphere, collectively known as white swans or northern swans. Black swans are distributed in Australia and other places in the southern hemisphere, and black-necked swans are distributed in South America. Together with another genus, Coscoroba coscoroba, they are called Southern Hemisphere Swan.

Four species of white swan distributed in the northern hemisphere have long been known. Because of their white feathers, graceful posture, touching voice and loyal behavior, white swans are regarded as a symbol of purity, loyalty and nobility in the eastern and western cultures of Eurasia.