Desert Night Snake’s are small snakes found in most of western and southern Arizona and northern borderlands. Terrain can be grasslands, woodlands, open sandy deserts to steep rocky wooded slopes.  Desert Night Snake’s are gray or tan in color with dark blotches on the back and a dark collar. A dark bar extends back from each eye and expands into the collar blotch. They are mostly nocturnal and hibernate during cold months. Their venom is considered dangerous to humans, although they will rarely bite. They use their venom on frogs, small snakes, and other reptiles, which they will eat. They will also eat eggs. We saw this one on a trail in the Arizona Transition Zone area of the state.