Crotalus lepidus is a venomous snake species found in the southwestern United States and northern Mexico, commonly known as the rock rattlesnake. It belongs to the family Viperidae and is a close relative of the diamondback rattlesnake. Other synonyms for Crotalus lepidus include the banded rock rattlesnake, the green rattlesnake, and the Mexican diamondback. Its body features a distinct pattern of dark stripes running down its back along with splotches of green, brown, and grey. Like other rattlesnakes, it uses its rattle as a warning signal when it feels threatened by potential predators or humans. Despite being venomous, it plays an essential role in controlling rodent populations and maintaining ecosystem balance.