- Tewaukon NWR is primarily a migratory bird breeding and rest area. It is located in the southeastern corner of North Dakota in Sargent County near Cayuga, ND. The refuge is located astride the Wild Rice River (western tributary of the Red River), which flows from west to east and then north out of Lake Tewaukon.
Numerous wetlands dot the gently rolling glacial till plain which forms the prairie. A mile or two to the south rise the beautiful hills of the Coteau, a glacial moraine. The rich bird and animal life associated with the many lakes and marshes made the Lake Tewaukon area a heavily used hunting and living site for early man. Lake Tewaukon was named for an ancient religious leader, the "Son of Heaven" or the Great Khan, Te Wauk Kon.
Wildlife species seen on the refuge include whitetailed deer, red fox, mink, raccoon, skunk, muskrats, beaver, badger and coyotes. A wide range of small mammals from weasels to shrews, mice and ground squirrels live on Tewaukon. Over 243 species of birds have been seen on the refuge including many species of waterfowl, wading birds, shorebirds, and prairie species.