The caterpillar of a Gulf Fritillary butterfly feeding on the leaf of a Passion Vine. It is autumn, the best time of year for finding caterpillars – an activity that offers enough excitement to pull kids of all ages away from their cell phones and electronic gadgets and get them to go outdoors with you! A little advance planning will increase your chances of finding caterpillars. If you know the favorite host plants for various kinds of butterflies and moths you