4,400-mile long river with thousands of tributaries, it is a 2,600,000-square mile basin, draining rivers and streams in eight countries (Brazil, Bolivia, Peru, Ecuador, Colombia, Venezuela, Guyana and Suriname), as well as French Guiana. Its broadleaved forest is the largest on the planet, home to more than 30,000 plant species, 1,800 fish, 1,300 bird species, 311 mammals and 165 types of amphibian.
