The hoatzin (/hoʊˈætsɪn/ hoh-AT-sin)[note 1] or hoactzin (/hoʊˈæktsɪn/ hoh-AKT-sin) (Opisthocomus hoazin)[4] is a species of tropical bird found in swamps, riparian  forests, and mangroves of the Amazon and the Orinoco basins in South America. It is the only extant species in the genus Opisthocomus[5] which is the only extant genus in the Opisthocomidae family under the order of Opisthocomiformes.[6] Despite being the subject of intense debate by specialists, the taxonomic position of this family is still far from clear.