What are 3rd sized insects? Wax worms should only be given as an occasional treat. Good feeders are snails, mantids, stick insects, hornworms, silkworms, butterworms, crickets, multiple types of flies and fly larvae, and multiple types of roaches. Isopods and bean beetles work great for smaller chameleons. Never feed mealworms, and superworms should only be given as a treat or to occasionally add variety.