- Medium-sized duck.
- Long, thin neck.
- Pointed tail, extremely long in males.
- Male with white chest, white stripe up neck, and dark reddish brown head.
Male DescriptionBreeding Plumage: Chocolate-brown head. White neck and underparts, white extending up back of neck in thin line. Very long black central tail feathers. Black rear end bordered by yellowish tan patch. Sides and upper back gray. Lower back feathers long and black with pale edges. Rear of wing (speculum) bronzy greenish with black band and white rear edge. Bill black with bluish gray stripes. Eyes dark brown. Legs gray.
Eclipse Plumage: Duller. Overall brownish. Head, throat, and neck medium brownish with fine dark streaks. Upperparts brownish to grayish with broad dark barring. Central tail feathers brown and long, but much shorter and wider than in breeding plumage. Bill black with bluish gray stripes. Eyes dark brown. Legs gray.
Female DescriptionCrown and face tan. Chin whitish. Back and rump brown with lighter edges to feathers. Upper breast buff or tan. Lower breast and belly white. Tail pointed, with central tail feathers longest. Rear of wing (speculum) bronzy greenish with black band and white rear edge. Bill dull black, occasionally with bluish stripes. Eyes dark brown. Legs bluish gray.
Immature DescriptionSimilar to adult female.