BUFFLEHEAD
bufflehead, butterball, dipper, Bucephela albeola
(noun) small North American diving duck; males have bushy head plumage
Source: WordNet® 3.1
Etymology
Noun
bufflehead (plural buffleheads)
A duck in the goldeneye genus, Bucephala albeola.
(obsolete) One who has a large head; a heavy, stupid fellow.
Synonyms
• (Bucephala albeola): woolhead
Source: Wiktionary
Buf"fle*head`, n. Etym: [Buffle + head.]
1. One who has a large head; a heavy, stupid fellow. [Obs.]
What makes you stare so, bufflehead Plautus (trans. 1694).
2. (Zoöl.)
Definition: The buffel duck. See Buffel duck.
Source: Webster’s Unabridged Dictionary 1913 Edition