The document describes the Sonoran Desert habitat. It is located in southwestern Arizona, California, and northwestern Mexico, receiving most of its moisture during two rainy seasons. The habitat supports over 2000 plant species including the saguaro cactus, along with 350 bird, 100+ reptile, and other species that have adapted to the hot, dry conditions. Specific animals like the Gila woodpecker and elf owl are highlighted for their dependence on the saguaro cactus for nesting and shelter.