Common mallard scientific name: Anas platyrhynchos belongs to swimming birds and large ducks. The body length is 47-62 cm, the weight is about 1 kg, and the appearance size is similar to that of domestic duck. The male`s mouth is yellow green, feet are orange yellow, head and neck are bright green, and the neck has an obvious white collar ring. The upper body is black brown, the upper part of the waist and tail is covered with black feathers, the two central tail feathers are also black, and they curl up into hooks; the outer tail feathers are white. Chestnuts. The wings, flanks and abdomen are gray white, with purple blue wing mirror. The upper and lower edge of wing mirror has wide white edge, which is very eye-catching when flying. The female duck`s beak is black brown, the tip of the beak is dark brown yellow, the foot is orange yellow and has purple blue wing mirror and wide white edge at the front and back of wing mirror.
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