Do any snakes that are good for pets eat insects?

The only species of snake that preys on insects is the Tentacled Snake. It preys on termites - and is absolutely NOT suitable as a 'starter snake' !

While the garter snakes do not eat insects, per se, they will feed on earthworms and small fish, such as minnows. These are usually easy to obtain in stores, such as Wal*Mart, bait shops, etc. They are easier to find food for than many other species of snake that require live mammals for food. With proper care, many garter snakes can make a good starter snake, are easily found in many parts of the Americas, and are generally not expensive. With time, they will become tame and not bite or release their nasty smelling anal defenses.