An Old World duck (Aythya fuligula) having a short, plump body and a crest on its head, the male of which has mostly black plumage.

• 凤头鸭：一种体短、肥胖，头带羽冠的欧洲鸭（凤头潜鸭），雄性凤头鸭大都长有黑色羽毛