Oscar Dewhurst / Hoatzin (Ophisthocomus hoazin) perched on wooden bar overlooking oxbow lake. Manu National Park, Madre de Dios, Peru. September

Staffan Widstrand / Hoatzin birds (Opisthocomus hoazin) perched on branch, Napo wildlife lodge, Amazonas, Ecuador, South America, April.

Konrad Wothe / Hoatzins (Opisthocomus hoazin) perched in rainforest, Tambopata Reserve, Peru, South America.

Glenn Bartley / Hoatzin (Opisthocomus hoazin) pair, Manu National Park, Peru

Pete Oxford / Hoatzin (Opisthocomus hoazin) perching on vertical branch, Yasuni National Park. Amazon Rainforest. Ecuador, South America

Konrad Wothe / Hoatzin (Opisthocomus hoazin) in rainforest, Tambopata National Reserve, Peru

Luiz Claudio Marigo / Hoatzins basking in sun {Ophisthocomus hoazin} Amazonas, Brazil

Luiz Claudio Marigo / Hoatzin {Ophisthocomus hoazin} Amazonas, Brazil

Luiz Claudio Marigo / Hoatzins basking in sun {Ophisthocomus hoazin} Amazonas, Brazil

David Tipling / Hoatzin in tree, Manu National Park, Peru.

Pete Oxford / Hoatzin (Opisthocomus hoazin). Manu NP, Peru

Oscar Dewhurst / Hoatzin (Ophisthocomus hoazin) perched on fallen tree branch. Manu National Park, Madre de Dios, Peru. September