The rivers of Illinois play a crucial role in the state's ecology and economy. Major rivers include the Illinois River, which flows through the central part of the state, and the Chicago River, known for its unique flow reversal. These rivers provide habitats for various wildlife and are vital for agriculture, transportation, and recreation. Additionally, the Mississippi River forms the western border of Illinois, serving as a significant waterway for trade and travel. Other notable rivers include the Kaskaskia River and the Sangamon River, each contributing to the diverse landscape and natural resources of the region.