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 the Xingu River. It adjoins the Capoto/Jarina Indigenous Territory to the west. Its boundary to the north is the border with the state of Pará. To the east the Fontourinha stream defines its boundary. The park is in the Amazon biome. 81.87% of the park is covered by savanna/pioneer contact, and 18% by savanna/rainforest contact. Xingu State Park was created by decree 3.585 of 7 December 2001 with an area of about . It was redefined by law 8054 of 29 December 2003, signed by the state governor Blairo Maggi, which reduced its size to . The reduction was justified