The black teal (Aythya novaeseelandiae) is also known as the New Zealand scaup because it is endemic to that country. The male has a distinctly yellow eye. It is black with a purplish, greenish sheen on the head and the rest of the body a brownish black with a green gloss. The female is similar, but without the yellow eye and has a small white band on the forehead above the beak in the breeding season. The black teal / NZ scaup is found throughout both the North and South Islands of New Zealand in deep freshwater lakes and ponds.