The Madeira River is one of the major tributaries of the Amazon River in South America. It flows through Bolivia and Brazil, covering a distance of approximately 3,380 kilometers (2,100 miles). The river is known for its rich biodiversity and is an important waterway for transportation and trade in the region. The Madeira River is characterized by its wide, meandering course and seasonal flooding, which supports diverse ecosystems along its banks. It is also home to various species of fish and wildlife, making it a vital resource for local communities and a key area for ecological research.