The desert that spans parts of the U.S. and Mexico is the Sonoran Desert. Covering approximately 100,000 square miles, it is known for its unique biodiversity, including the iconic saguaro cactus. The Sonoran Desert experiences extreme temperature variations and seasonal rainfall, which contribute to its varied ecosystems. It is home to various wildlife species and supports numerous human settlements. Conservation efforts are crucial in preserving this desert's unique environment, especially against threats from urban development and climate change.