Take a Look Around Enjoy this aerial tour of the Wild Horse Island Unit of Flathead Lake State Park Wild Horse Island on Salish-Kootenai land, has been a landmark since the Kootenai Natives were reported to have used it to pasture horses. The park is noted for its wildlife including bighorn sheep, mule deer, songbirds, waterfowl, bald eagles, and falcons, as well as five wild horses.