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The Ventuari River is the largest
tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage ...
of the
Orinoco The Orinoco () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers , with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the fourth largest river in the wor ...
in southern
Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th ...
. The Ventuari flows from south-central Venezuela in the
Guiana Highlands The Guianas, sometimes called by the Spanish loan-word ''Guayanas'' (''Las Guayanas''), is a region in north-eastern South America which includes the following three territories: * French Guiana, an overseas department and region of France * ...
southwest into the Orinoco River. It is long and its major tributary is the
Manapiare River Manapiare River is a river of Venezuela. It is part of the Orinoco River basin. See also *List of rivers of Venezuela This is a list of rivers in Venezuela. By drainage basin This list is arranged by drainage basin, with respective tributaries ...
. The river drains the
Guayanan Highlands moist forests The Guayanan Highlands moist forests (NT0124) is an ecoregion in the south of Venezuela and the north of Brazil and in Guyana, Suriname, French Guiana. It is in the Amazon biome. It encompasses an upland region with diverse fauna and flora, which ...
ecoregion. The Ventuari River is the largest
clearwater Clearwater or Clear Water may refer to: Places Canada * Clear Water Academy, a private Catholic school located in Calgary, Alberta * Clearwater (provincial electoral district), a former provincial electoral district in Alberta * Clearwater, Briti ...
tributary of the Orinoco. , 470 fish species were known from the river, including several
endemics Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...
, and a few new species have been described from the river since then.


References

* Hitchcock, Charles B. ''La región Orinoco Ventuari''. Relato de la Expedición Phelps al Cerro Yaví. Caracas: Ministerio de Educación Nacional, Imprenta El Compás, 1984 (Translated from an older English Edition: ''The Orinoco - Ventuari Region''. American Geographical Society, 1947). * Koch-Grünberg, Theodor. ''Vom Roraima zum Orinoco''. 1917. Reissued by
Cambridge University Press Cambridge University Press is the university press of the University of Cambridge. Granted letters patent by Henry VIII of England, King Henry VIII in 1534, it is the oldest university press A university press is an academic publishing hou ...
, 2009; . Rivers of Venezuela Orinoco basin {{Venezuela-river-stub