http://nationalzoo.si.edu/Animals/ReptilesAmphibians/Facts/FactSheets/Cornsnake.cfm
"DISTRIBUTION AND HABITAT:
Corn snakes are found in the eastern United States from southern New Jersey south through Florida, west into Louisiana and parts of Kentucky. However, corn snakes are most abundant in Florida and the southeastern U.S.
Corn snakes may be found in wooded groves, rocky hillsides, meadowlands, woodlots, barns, and abandoned buildings.
DIET IN THE WILD:
Corn snakes do not usually feed every day instead they feed every few days. Young hatchlings tend to feed on lizards and tree frogs, while adults feed on larger prey, such as mice, rats, birds, and bats. They are constrictors. First a corn snake bites the prey in order to obtain a firm grip, then it quickly wraps one or more coils of its body around the victim. The snake squeezes tightly until it suffocates the prey. Then it swallows the food whole, usually head first. However, corn snakes have also been observed swallowing small prey alive.
ZOO DIET:
They are fed mice, rats, and chicks." Hope this helps.