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.