Jewel Caterpillars are the larval stage of several species of Dalceridae moth, found in the rainforests of Central and South America. Sometimes known as "slug caterpillars", their gelatinous translucent coating gives them the appearance of a discarded jewel. But touching them is not advised - this coating is sticky and unpleasant, acting as a deterrent to predators. The spines break off easily, allowing the caterpillar to wiggle away from attack. They do not appear to be poisonous.