The Night Snake has smooth scales, a divided anal scale, and eye pupils that slit vertically when exposed to strong light. This snake is gray or grayish yellow with 50-70 dark brown blotches on its back. There are three elongate brown blotches at the neck. Adults grow to 14-16 inches in length. Known populations are found in dry rocky areas in open terrain in the Red Hills of south-central Kansas near the Kansas-Oklahoma border.
Survey work has shown that this snake is one of the most common snakes within survey areas in the Red Hills.