A Miocene Species, Extant, Advanced & Prehistoric.
Greetings. The hoatzin, Opisthocomus hoazin, is a species of tropical avian dinosaur that arose in the Miocene approximately 23 million years ago, a native of the Amazon and Orinoco river basins of South America. The only extant species of the ancient genus Opisthocomus, the hoatzin occupies swamps, mangroves, and other tropical forest habitats. The species has been successful since it first appeared in the fossil record, and has several contradictory physical characteristics that confirm its ancient lineage, yet suggest advanced evolutionary processes at work. The young of the species possess claws on two of its wing digits, unique to modern birds, and reminiscent of Jurassic and Cretaceous Period birds. Adults have digestive systems that are capable of fermentation and the processing of plant matter, two attributes known from some primates and herbivorous ungulate mammals, but not known from any other species of modern bird. Hoatzins have a length of about 65 centimeters, ...