Birds - Devils Tower National Monument (U.S. National Park Service) Devils Tower National Monument provides several ecosystems for more than 160 species of birds. They can be found in the riparian areas along the Belle Fourche River, hunting prey in prairie dog town and foraging in the ponderosa pine forest beside Devils Tower. Even the rocky crags of the Tower offer ideal nesting locations. Consequently, a diversity of birds migrate through and nest in the park.