Desert Tortoises (Gopherus agussizii) are found locally in the Mojave and Sonora deserts of southeastern California, Nevada, and through the southern areas of Arizona into Mexico. These tortoises can amazingly live to be 100 years old, only producing eggs every two to three years. To survive in the desert these tortoises will dig basins to catch the rain and have been known to wait by these basins when rainfall appears. Most of their moisture needs though come from their diet of greens, grasses, and wildflowers.