Milk Snake, a non poisonous, useful species of king snake. The milk snake is found throughout the eastern United States and in southern Ontario. It frequents barns and farmyards in search of mice and rats. The milk snake attacks and swallows both harmless and poisonous snakes, and is at least partly immune to most snake venom. Their red, black, and yellow bands make them look like coral snakes. Coral snakes are deadly - which is why a lot of milk snakes end up dead. People often mistake them for coral snakes and kill them.