Also found in: Wikipedia.
Related to Stifftail: Oxyura


n.1.The ruddy duck.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Microsatellite markers for two stifftail ducks: the white-headed duck, Oxyura leucocephala, and the ruddy duck, O.
They are members of the "stifftail" tribe of ducks and it is easy to see how they got the name.
Evolution of diving adaptations in the stifftail ducks.
3: Waterfowl (Part 2) Eiders, Wood Ducks, Diving Ducks, Mergansers, Stifftails. New Haven, CT: Yale University Press.