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
American River, South Australia fuel facilities. Recently however, the advent of oyster farming has seen new shedding erected and increased activity, in harmony with recreational boating activities. The population has increased steadily in recent years, while nearby hamlets in the vicinity of Eastern Cove, such as Island Beach and Baudin Beach, South Australia have become more prominent. Electricity supply to American River was only made permanent in 1967. The establishment of guest houses at American River in the early part of the last century were the forerunner of today's tourism industry on Kangaroo Island. Ryberg, Lierich, and Linnett, are names synonymous with the development