The Great Curassow is a physically large Cracid that ranges from Mexico south to Ecuador. It is a secretive species found in humid tropical forests that feeds mostly on fruits but also eats small invertebrates as well as vertebrates. Males are black with white under parts, a shaggy crest and a bright yellow spherical knob on the bill. Females are polymorphic, usually either barred (rare), rufous, or blackish. The Great Curassow have varying calls that range from low frequency booms to high-pitched yips. The species is declining due to habitat loss and overhunting, but it still can be seen stealing across the forest floor or feeding in the upper levels of the tree canopy.