Straddling the U.S.-Mexico border, the Sonoran Desert is an example of a thriving desert ecosystem.Combining mild winters with a fairly high amount of rainfall, the Sonoran provides an environment that can support many more plants and animals than other deserts.The Sonoran's habitats include soaring mountains, deep canyons, rolling sand dunes, and level desert plains.Human encrouachment has begun to threaten these habitats.Fortunately, many people...