 The ancestral great curassows then spread along the Pacific side of the Andes, and into Central America during the Pliocene and Pleistocene as part of the Great American Interchange.Due to ongoing habitat loss and overhunting in some areas, the great curassow is evaluated as Vulnerable on the IUCN Red List of Threatened Species.It is listed on Appendix III of CITES in Costa Rica, Guatemala, Colombia and Honduras.