The brown water snake (Nerodia taxispilota) is a large species of nonvenomous natricine snake endemic to the southeastern United States.
N. taxispilota is found in lower coastal regions from southeastern Virginia, through North Carolina, South Carolina, and Georgia, to northern and western Florida (Gulf Coast), then west through Missouri, Alabama, and Mississippi, to Louisiana, normally from sea level to 500 ft. (150 m) elevation. The Nerodia Taxispilota is also very common in Michigan.