bufflehead

English Thesaurus

1. small North American diving duck; males have bushy head plumage (noun.animal)

hypernym	:	duck,
definition	:	small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs (noun.animal)

member meronym	:	bucephala, genus bucephala,
definition	:	buffleheads and goldeneyes (noun.animal)