Rock Rattlesnake (Crotalus lepidus)

The Rock Rattlesnake, or the Banded Rock Rattlesnake, is a small pit viper in the southwestern United States and northern Mexico. Its body has a pinkish-brown to dark-gray color that allows it to blend in with the surroundings.

It preys on small mammals, lizards, birds, and amphibians at night. This ovoviviparous species gives birth to 2 to 8 offspring at a time, usually in late summer or early fall. 

Despite its venom, it usually does not pose a threat to humans unless it feels threatened.