Bullsnake

Family: 
Colubridae (nonvenomous snakes) in the order Squamata (lizards and snakes)
Description: 

The bullsnake is Missouri's largest snake. It is tan or cream-colored with numerous, large, brown or black blotches. The tail may have light and dark bands. Often a dark line angles from the eye down to the jaw. The belly is yellow or cream-colored, with dark brown or black spots along the sides. This large snake may hiss loudly and vibrate its tail when alarmed.

Size: 
Length averages from 37 to 72 inches (94-183 cm).
Habitat and conservation: 
Commonly considered a prairie species, it may also be found in open areas along the border of the Ozarks. Bullsnakes take shelter in large clumps of grass or mammal burrows.
Foods: 
Food includes small mammals—especially rodents—as well as birds and bird's eggs. This species is extremely valuable in controlling destructive rodents. Bullsnakes kill their prey by constriction.
Distribution in Missouri: 
Statewide except for the southeastern third of the state.