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
South American U20 Championships in Athletics Medals are awarded for individuals and relay team members for the first three places in each event. Trophies are awarded to teams in each category (male and female) with the highest total number of cumulative points in the entire competition. In addition, a trophy will be given to the country for the overall title. A trophy is also presented to both a male and a female athlete for the most outstanding performance. South American U20 Championships in Athletics The South American Junior Championships in Athletics are the South American championships in the sport of athletics which is open for those