The hoatzin (Opisthocomus hoazin)is a South American folivorous bird, with a crop microbial ecosystem that ferments dietary plant material. Juvenile birds progressively become independent from the chicks fed by adults ...

The Hoatzin is one of the world’s few obligate folivorous birds inhabiting the riverine forests of northern South America. It is the smallest vertebrate to have an enlarged foregut, in which plant structural carbohydrates ...