The hoatzin (/hoʊˈætsɪn/ hoh-AT-sin) or hoactzin (/hoʊˈæktsɪn/ hoh-AKT-sin), (Opisthocomus hoazin), is the only species in the order Opisthocomiformes. It 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 notable for having chicks that have claws on two of their wing digits. It is the only member of the genus Opisthocomus (Ancient Greek: 'long hair behind', referring to its large crest). This is the only extant genus in the family Opisthocomidae. The taxonomic position of this family has been greatly debated by specialists, and is still far from clear. (Source: Wikipedia.org, CC BY-SA)