The Sidewinder lives in sandy places. To move through the sand they throw their bodies sideways across the sand, this is called sidewinding. This way of moving uses less energy than slithering and it also helps keep the Sidewinder cool in the heat of the desert. They also have a pair of horns over their eyes that work like visors to block the hot sun. The small visor-like horns are an adaptation that they have developed to help them in their hot desert life.