- Length: 13 inches Wingspan: 36 inches
- Large, long-legged, long-necked duck
- Sexes similar
- Dark bill
- Dark legs
- Rich buff head, neck, chest and belly
- Black back with chestnut edging to feathers
- White flank stripe
- White rump and undertail coverts
- Dark tail
- Wings dark with chestnut upperwing coverts visible in flight
- Like adult, but duller with less contrast between back and rump
Adult unmistakable. Immature could be confused with immature
Black-bellied Whistling-Duck, but note the dark rump, white wing
stripe, and the lack of white flank stripe in the latter.
Length and wingspan from: Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc.