Both sexes of the American Black Duck have almost identical plumage. The body is a dark brown color, the crown is a lighter brown on the neck and head, with a dark stripe through the eye. In flight, the white wing linings can be seen in contrast with the rest of the dark wings and body. During the breeding season, the adult male has a yellow bill and often bright red feet, while the adult female has an olive green bill and olive-coloured feet. For more information about waterfowl please visit www.fws.gov/birds/.