bufflehead
/ˈbʌflhed/noun
1- a small North American diving duck related to the goldeneye, with alarge puffy head. The male has white plumage with a black back.（产于北美的）白枕鹊鸭。
1.1
- Bucephala albeola, family Anatidae.拉丁名Bucephala albeola, 鸭科。
词源
mid 17th cent.（in the sense 'simpleton'）： from obsolete buffle 'buffalo' +HEAD. The current sense （mid 18th cent.） may be an independent formation because of the duck's large square-shaped head.