Lesser Scaup are the most abundant members of the diving ducks in North America. They are social animals and are usually seen with other ducks. During winter, they will migrate as far south as Central America. Males have yellow eyes, a blue bill, a brown/gray body, and a black head that is iridescent purple/green sheen. During mating season, males will display a black and white plumage. Females have a brown body and dark brown head, sometimes with a white patch next to their bill.