Very large game bird of tropical forest, eliminated from most areas by hunting. Rarely found except in protected parks or very remote areas. Usually seen on the forest floor, singly or in small groups, but also feeds in trees. Males often sing from high in canopy: song is a very low-pitched, almost subliminal, booming sound. Not likely to be confused if seen well. Both sexes have distinctive curly crest. Female plumage is variable: some have bold barring, others have darker and mostly unbarred plumage.