River — Araguaya

The river acts as a vital transition zone between the Amazon rainforest and the Cerrado savanna . It is home to more than 700 bird species and 300 fish species, including the giant otter, the pirarucú (one of the world's largest freshwater fish), and the endemic Araguaia River dolphin . Historical and Cultural Context

The region’s colonial history was marked by and subsequent slave-hunting expeditions, which significantly displaced local populations. In the 1970s, the river's remote terrain became a strategic battleground during the Araguaia Guerrilla War , a conflict between left-wing resistance and Brazil's military dictatorship. Modern Significance and Threats araguaya river

Today, the Araguaia is a central figure in Brazil's environmental and economic discussions: The river acts as a vital transition zone