Black swan, with the longest neck in the swan species. This slender neck is usually arched or erect in an "s" shape. The whole body feathers are curled, and the body feathers are twinkling with spots, mainly in black gray or black brown, the abdomen is gray white, and the flying feathers are white. The tail is long and forked, and the outer feather end is blunt and upturned, like a harp. There is a bright waxy beak, red or orange red, with a white horizontal line near the end. Iris is red or white, tarsometatarsal and webbing are black. There are 2 subspecies in total, and the mouth of the named subspecies is thick.
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