绿头鸭，又名大头绿（雄）、蒲鸭（雌），水鸭是家鸭的野生种。绿头鸭飞行速度可达到每小时65公里。

绿头鸭常集群活动，营巢于水边的草丛中及树洞等地。每窝产7到11枚卵，孵化期24至27天。有些地区由于过度捕猎而数量减少。

The mallard (/ˈmælɑːrd/ or /ˈmælərd/) or wild duck (Anas platyrhynchos) is a dabbling duck which breeds throughout the temperate and subtropical Americas, Europe, Asia, and North Africa, and has been introduced to New Zealand, Australia, Peru, Brazil, Uruguay, Argentina, Chile, the Falkland Islands and South Africa. This duck belongs to the subfamily Anatinae of the waterfowl family Anatidae.