|Genus Oxyura, Stiff-tailed Ducks are small diving ducks with a characteristic shape and stiff tails. Oxyura ducks dive for crustaceans.|
Most closely related to the migratory North American Ruddy Duck. Male Andean Ducks in Colombia may have a cheek colored white, black or some combination of white and black, indicating some past hybridization.
A male with white cheek.