The corn snake (Pantherophis guttatus) is a North American species of rat snake that subdues its small prey by constriction. It is found throughout the southeastern and central United States. Though superficially resembling the venomous copperhead and often killed as a result of this mistaken identity, corn snakes lack functional venom and are harmless. Corn snakes are beneficial to humans by helping to control populations of wild rodent pests that damage crops and spread disease.