The Collaborative International Dictionary of English v.0.48:

Megapode \Meg"a*pode\ (m[e^]g"[.a]*p[=o]d), n. [Mega- + Gr.
   poy`s, podo`s, foot.] (Zool.)
   Any one of several species of large-footed, gallinaceous
   birds of the genera Megapodius and Leipoa, inhabiting
   Australia and other Pacific islands. Called also mound
   builder, scrub fowl, moundbird, and brush turkey. See
   Jungle fowl
   (b) under Jungle, and Leipoa.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

moundbird \moundbird\, mound bird \mound bird\n. (Zool.)
   Any of several large-footed short-winged birds of
   Australasia, which build mounds of decaying vegetation to
   incubate eggs. Called also mound builder, mound maker,
   megapode, brush turkey, and scrub fowl.

   Syn: megapode, mound builder, scrub fowl, brush turkey.
        [WordNet 1.5]

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]

WordNet (r) 3.0 (2006):

brush turkey
    n 1: black megapode of wooded regions of Australia and New
         Guinea [syn: brush turkey, Alectura lathami]