Waxworms are a live feeder insect and a favorite treat of reptiles and amphibians. Waxworms are medium-white caterpillars with black-tipped feet and small, black or brown heads. When kept in captivity, they can go a long time without eating, particularly if kept at a cool temperature. Captive wax worms are generally raised on a mixture of cereal grain, bran and honey.These are popular since they do not need to be fed, can be kept in the fridge (no lower than 50 degrees) and last for months without any maintenance whatsoever. Their substrate, usually wood shavings, should be kept dry. Wax worms are a popular common reptile/amphibian food but they should only be fed as a treat since they are high in fat. Think of them as candy bars for your critters!