The river serves as a principal means of transportation, being plied by tiny dugout canoes, larger ones, motorboats, and riverboats known locally as lanchas. The boats carry a multitude of cargoes, sometimes being chartered, sometimes even being traveling general stores. In the Colombian section, the presence of guerrillas and soldiers used to limit river traffic. See also Caquetá Department References External links Environmental information of Colombian Amazon region Rivers of Amazonas (Brazilian state) Rivers of Colombia Tributaries of the Amazon River International rivers of South America