Ireng River

The sources of the river are in the 116,748 hectares (288,490 acres) Monte Roraima National Park, created in 1989.

[2] The larger part of the Ireng River basin forms the frontier between Brazil and Guyana.

Their courses are through breathtaking formations of sedimentary rocks formed by tectonic movements in ancient times.

The Ireng River's waters are dark, bearing a striking resemblance to that of Rio Negro near Manaus, in Brazilian state of Amazonas.

[4] The Ireng River region is home to such reptile species as the Antilles leaf-toed gecko (Hemidactylus palaichthus) and rainbow whiptail (Cnemidophorus lemniscatus); amphibians such as the sapo dorado (Bufo guttatus) and Leptodactylus bolivianus; birds including the Muscovy duck (Cairina moschata), black vulture (Coragyps atratus), crested caracara (Caracara plancus), double-striped thick-knee (Burhinus bistriatus) and numerous others; mammals include the South American tapir (Tapirus terrestris), jaguar (Panthera onca) and the red-rumped agouti (Dasyprocta leporina).