Reptiles have an advantage when it comes to living in the desert. They have really thick skin that helps keep water in. They spend time moving around, looking for shady areas. Some lizards have long legs, which makes it better since they do not absorb much heat. When the season changes, they climb on rocks that are heated in order to raise their temp.
They are cold-blooded, which makes it difficult because they must avoid both high and low temperatures.
Few reptiles, however, go through hibernation. They go to sleep during the hot weather. Before this time, they eat large amounts of food so that a layer of fat could form throughout their bodies. They utilize their stored fat that they obtain during the cooler season to survive.
