Lewis and Clark traveled the Missouri River in their famous journey to explore western North America. Although the river has now been dammed, channelized, and otherwise altered, some natural flowing stretches can be found in South Dakota. And several listed species such as the least tern, piping plover, and pallid sturgeon call the South Dakota reach of the river home. The White, Little White River and Cheyenne have the sturgeon chub and the Little White has the ability to support otter reintroduction.