<P> The Orinoco River is one of the longest rivers in South America at 2,140 kilometres ( 1,330 mi ) . Its drainage basin , sometimes known as the Orinoquia , covers 880,000 square kilometres ( 340,000 sq mi ) , with 76.3 percent of it in Venezuela and the remainder in Colombia . It is the fourth largest river in the world by discharge volume of water . The Orinoco River and its tributaries are the major transportation system for eastern and interior Venezuela and the llanos of Colombia . The Orinoco River is extremely diverse , and hosts a wide variety of flora and fauna . </P>
where is the orinoco river located on a map
in South America