Mississippi River | River Thames | Amazon River | Columbia River | Hudson River | Colorado River | Potomac River | river | Ohio River | Missouri River | Delaware River | Murray River | River Tyne | Madeira River | Volga River | River Nene | River Clyde | River Trent | River Severn | Amur River | River Wear | Allegheny River | Red River | Dnieper River | Yarra River | Paraná River | River Tees | Fraser River | Yangtze River | Tocantins River |
When Europeans first arrived in the western Amazon Basin in significant number in the late 17th and early 18th century, Omagua was spoken by approximately 100,000 individuals in two major areas: along the Amazon River proper, between the mouths of the Napo River and Jutaí River, and in the vicinity of the Aguarico River, a tributary of the upper Napo River.