"The Duck" is 284 miles long and home to over 50 species of freshwater mussels and 151 species of fish. In addition to its aquatic biodiversity, the Duck River supports an estimated 150,000 kayakers, anglers, and boaters and serves as a water source for nearly 250,000 residents in Middle Tennessee. The Duck River holds the No.1 spot for Most Biodiverse River in North America and ranks in the top 5 most biodiverse rivers in the WORLD. In fact, according to National Geographic, our beloved Duck River ranks along with the Amazon River - and it is in danger.