These members of the rodent family feed on a variety of plants, which are mainly found within their towns. The towns consist of an elaborate system of underground tunnels in which their dens are found. Members of the town keep a watch out for predators, such as hawks, and let out a warning bark to other members when danger is present. Prairie dogs received their name due to the barking-like noises they emit when danger is present. Sullys Hill is home to a wide variety of waterfowl, such as wood ducks, Canada geese, white pelicans, mallards, hooded mergansers, and many other species native to the area.
Management includes putting up artificial nesting structures to provide secure nesting.
The preserve's wildlife community contains many other species including foxes, raccoons, skunks, weasels, mink, beaver, rabbits and wild turkeys. Also, there are more than 200 species of birds to observe. It provides many wildlife viewing opportunities, so bring your binoculars. While driving the Auto Tour Route stop at the Devils Lake Vista and Sullys Hill Overlook to take in breathtaking views of the area. The Devils Lake Vista is handicapped accessible.