绿头鸭又叫做野鸭，是一种会依季节移栖的候鸟，冬天时飞向温暖的南方，夏天时再飞回北方的繁殖地进行繁殖。
The mallards are migratory birds sometimes called wild ducks. They fly to the warm South in winter, then return to the North in summer for breeding.
绿头鸭又叫做野鸭，是一种会依季节移栖的候鸟，冬天时飞向温暖的南方，夏天时再飞回北方的繁殖地进行繁殖。
The mallards are migratory birds sometimes called wild ducks. They fly to the warm South in winter, then return to the North in summer for breeding.
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