Caterpillars are larvae in the class Insecta that turn into beautiful moths or butterflies. Striped caterpillars are some of the most striking caterpillars you will find in your garden or in the wild. Different species of caterpillars with stripes can be identified by their vibrant colors, hairiness, number of spines, or size. Some of the most interesting striped caterpillars have black, white, and yellow stripes and long horns.