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
Hutt River (South Australia) of Clare. In late May 1839, based upon information supplied by Hill, the explorer Edward John Eyre followed in Hill's footsteps, tracing it downstream to its junction with the Broughton River. Hutt River (South Australia) The Hutt River (Kaurna: Parriworta) is a river located in the Mid North and Clare Valley regions of the Australian state of South Australia. The river rises near Sevenhill and flows generally in a northern direction through the town of Clare and through good farming and pastoral country before reaching its confluence with the Broughton River south of . The river descends over its course.