The Collaborative International Dictionary of English v.0.48:

Brush turkey \Brush" tur`key\ (Zool.)
   A large, edible, gregarious bird of Australia (Talegalla
   Lathami) of the family Megapodid[ae]. Also applied to
   several allied species of New Guinea.
   [1913 Webster]

   Note: The brush turkeys live in the "brush," and construct a
         common nest by collecting a large heap of decaying
         vegetable matter, which generates heat sufficient to
         hatch the numerous eggs (sometimes half a bushel)
         deposited in it by the females of the flock.
         [1913 Webster]