Iriri River Iriri River The Iriri River () is a large tributary of the Xingu River in Brazil, in the state of Pará. It is long making it the 116th longest river in the world (with Krishna River, India) and the 15th longest in the Amazon basin. The headwaters are the traditional home of the Panará people. The river rises in the Nascentes da Serra do Cachimbo Biological Reserve, a strictly protected conservation unit established in 2005 in the Serra do Cachimbo. It is one of the headwaters of the Xingu River. It flows for before joining the Xingu, running through the
Tapajós-Xingu moist forests These include osprey ("Pandion haliaetus"), harpy eagle ("Harpia harpyja"), channel-billed toucan ("Ramphastos vitellinus"), little chachalaca ("Ortalis motmot"), nine tinamou species (Crypturellus and Tinamus genera), seven macaw species (Ara genus) including hyacinth macaw ("Anodorhynchus hyacinthinus"), many parakeets (Aratinga, Pyrrhura and Brotogeris genera), parrots (Amazona and Pionus genera) and hoatzin ("Opisthocomus hoazin"). Endangered birds include the green-thighed parrot ("Pionites leucogaster") and red-necked aracari ("Pteroglossus bitorquatus"). The World Wildlife Fund classes the ecoregion as "Vulnerable". The Tapajós-Xingu, Xingu-Tocantins-Araguaia and Tocantins-Pindara moist forest ecoregions on the eastern edge of the Amazon basin have all been badly affected by human settlement and deforestation. Roads have