The Collaborative International Dictionary of English v.0.48:

Anatiferous \An`a*tif"er*ous\, a. [L. anas, anatis, a duck +
   -ferous.] (Zool.)
   Producing ducks; -- applied to Anatif[ae], under the absurd
   notion of their turning into ducks or geese. See Barnacle.
   [1913 Webster]