A wild duck (Anas platyrhynchos) of which the male has a green head and neck. Most domestic ducks descend from the mallard.
一种野鸭（绿头鸭），其雄鸟具有绿色的头和颈。大部分驯化了的家鸭都是绿头鸭的后裔。
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We see a brown bear, a red bird, a green frog, a black sheep, a goldfish, a yellow duck, a blue horse, a purple cat, a white dog, and a teacher looking at us.