Found in the arid grasslands of the western part of Southern Africa, the fairy circles are circular patches of barren land. Typically occurring in monospecific grassy vegetation, the circles vary between 2 and 15 meters (7 and 49 feet) in diameter. The origin and history of fairy circles have long been a puzzle and even now, scientists are still not sure who or what create them. One favored assumption is that a sand termite is responsible for the circles, but the range of the phenomena is much wider than that of the termite species.