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
Bridge River Country refer to the Bridge River as the "West Cariboo" but this never caught on. Though essentially consisting of the basin of the Bridge River and its tributaries, the Bridge River Country includes the communities of D'Arcy, McGillivray Falls, Seton Portage and Shalalth, which lie in the valley of Seton and Anderson Lakes and the Gates River just to the south, are also considered to be part of the Bridge River Country, and also simultaneously of the Lillooet Country. After the 1930s the term "Bridge River-Lillooet" came into currency as a result of the chosen masthead of the fledgling Bridge River-Lillooet