The Bufflehead drake, a North American sea duck, in breeding plumage has iridescent purple and green highlights on his head

The Bufflehead female is mainly grey with a brown head and white cheek-spot

Bufflehead pair

The Bufflehead is a very small duck (cf. Black-headed Gull)

He's a Petrol-head

Bufflehead - duck and drake

Bufflehead - adult male

Bufflehead - female

Bufflehead drakes - back view