Caterpillar.

Several years ago the Lewis Ginter Botanical Gardens imported a number of butterflies for a special exhibit. They were allowed to eat specific plants and reproduce hence this caterpillar.

To comment that the caterpillars had a voracious appetite would be a marked understatement. I watched as they devoured large leaves literally in seconds. They never paused but keep biting and chewing until nothing was left but a stem, and then promptly started on the next leaf.

Note that the caterpillar's have two sets of antenna so that it is difficult to tell which end is the head. This protects them from predators. In case you can't tell, the head is facing upward.