The mallard is a national protected animal. In 2000, the country listed mallard as a national second-class protected animal. The reason why a mallard duck is called a mallard duck is that some feathers on its head are green, and there is a circle of white feathers under its neck. The whole mallard duck is in a very beautiful state, and its body is similar to that of an ordinary duck.

The mallard duck is also called big green head, red-legged duck, official duck, duckling, hemp duck, green edge, yellow-green male duck beak, orange-yellow feet and bright green head and neck, with obvious white-collar workers on the neck, dark brown upper body and black feathers on the waist and tail, and two pairs of central tail feathers are also black and curled into hooks, with white tail feathers on the outside and chestnut chest, wings and wings.