- Large, thin diving duck.
- Long, thin, orange to red-orange bill.
- Shaggy crest on back of head.
- White patches in wing visible in flight.
- Male with gray sides, dark reddish chest, white neck, and iridescent green head.
Male DescriptionBreeding (Alternate) Plumage: Head iridescent greenish black. Neck white. Chest deep rusty speckled with black. Back dark with long white patch along wings. Tail gray. Outer part of wings black. Bill scarlet-orange. Eyes red.
Nonbreeding (Basic) Plumage: Head rusty brown with long, ragged double crest. Chin pale or gray. Breast, back, wings and tail slaty gray. Belly and flanks white. Bill scarlet-orange. White patch in wing visible in flight. Like female, except has less white on chin, darker back, and wing with larger white patch.
Female DescriptionHead rusty brown with long, ragged, double crest. Chin dark or pale, gradually merging with chest color. Breast, back, wings and tail slaty gray. Belly and flanks white. Bill scarlet-orange. White patch in wing visible in flight.
Immature DescriptionImmature resembles adult female.