This little inchworm that is living on my sunflower is not even an inch. Inchworms are not worms but caterpillars. Their only defense mechanism is to become rigid and act like a twig or part of a leaf. Unlike most caterpillars that have “feet” all along their body, inchworms only have them at their head and tail end therefore; they have to hang from wherever they are as you will see in my sunflower. The reason you see so many inchworms hanging from trees is that they are going to the ground to pupate.