Today, Tennessee is one of the most biodiverse states in the nation. Currently there are more than 325 species of fish, 89 mammals, 61 reptiles, 70 amphibians, and 340+ birds known to inhabit or migrate through Tennessee. The number of invertebrate species, many of which are endemic to Tennessee, is equally impressive with 256 land snails, 99 aquatic snails, 120+ mussels, 77 crayfish, and a multitude of insects. There are also more than 2,300 varieties of plants.