Amazon river dolphin widespread river dolphins. They are present in six countries in South America: Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela, in an area covering about . The boundaries are set by waterfalls, such as the Xingu and Tapajós rivers in Brazil, as well as very shallow water. A series of rapids and waterfalls in the Madeira River have isolated one population, recognized as the subspecies "I. g. boliviensis", in the southern part of the Amazon basin in Bolivia. They are also distributed in the basin of the Orinoco River, except the Caroni River and the upper Caura River in Venezuela. The
Xingu State Park on the basis of a referendum of the people of Santa Cruz do Xingu by technicians from the State Environmental Foundation (FEMA). The agricultural frontier was limited by the amount of protected land, some of which had to be released for expansion of food production. The consultative council was established on 28 September 2007. The objectives are to protect and conserve the various ecosystems and to prevent human actions that would jeopardise the future of the many indigenous groups found in the park. The conservation unit is supported by the Amazon Region Protected Areas Program. Xingu State Park Xingu State