(noun) A type of duck that dives deeply and swims underwater to feed on aquatic vegetation, insects and occasionally small fish. These ducks are strong swimmers and will dive for protection, but they are uncertain and awkward on land.
Diving ducks are found on large, open bodies of water such as lakes, bays and estuaries, as well as in coastal areas. Species of diving ducks include buffleheads, lesser and greater scaups, canvasbacks, redheads, common goldeneyes and ruddy ducks.
Photo - Redhead © Alan Vernon