Bufflehead

Bucephala albeola

The name is supposedly a worn-down 'buffalo head,' for its big puffy head. Its scientific name, Bucephala, says it too: 'bullheaded' in Greek.

Bucephala is Greek for 'bullheaded'; albeola means 'whitish.' Alexander the Great's horse, Bucephalus, had the same name: 'ox-headed.'