The caterpillars for the pandora sphinx moth are large, green or red with a swollen third thorax segment into which the head and first two thoractic segments can be drawn. The abdomen has a small white spot on the second segment, and big white oval spots the last five spiracles. They also have the characteristic "horn" at the end of the abdomen, until it is replaced by a button in its last instar. Larvae consume copious amounts of foliage, and when they are ready they climb down their host plant and burrow underground, where they pupate.
Pandora Sphinx Caterpillar
Aaron Carlson [CC BY-SA 2.0] via Flickr
