Aythya affinis
Lesser Scaups are medium sized diving ducks. The males have finely barred, gray backs and white underparts. Their heads, necks, and breasts are black with a purple iridescence. They have blue gray bills, yellow eyes and black wings with large white patches. Female Lesser Scaups are brown overall with white bellies, white wing patches and white patches near the base of their bills. Females have brownish eyes.