Crotalus viridis, commonly known as the Western Rattlesnake, is a robust and stocky snake native to western North America, characterized by its distinctive olive, tan, and gray coloration, a signature rattle at the tail, and a diet primarily consisting of small mammals and birds. This species thrives in diverse habitats, including deserts, grasslands, and rocky hillsides, playing a vital role in the ecosystem as both predator and prey.