Black billed swan specimen
The black billed swan, also known as the trumpet swan, is the largest native waterfowl in North America and is named after its unique horn like call. The body length is usually between 138 and 165 centimeters, the wingspan can reach 185 to 304.8 centimeters, and the weight is between 7 and 13.6 kilograms. They are the heaviest flying birds in North America. Due to overfishing and habitat loss, the population sharply declined in the early 20th century. By implementing protective measures and reintroducing the project, the population has now recovered to some extent
Black Swan Specimen
The black swan is a bird species belonging to the family Cynoglossidae in the order of geese. The black swan is covered with flocculent gray feathers on its back; The neck is slender and often curved into an elegant "S" shape; The beak is bright red with a "V" - shaped white discharge at the front end; The iris is reddish red, and the tarsus and fins are black. Its physical characteristics are that except for a small part of the primary feathers that are white, the rest of the body's feathers are bright and black, hence the name.
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