The four life stages of the sphinx moth worm include the egg, larva, pupa, and adult. The larva is white to pale yellow and it has a black spine and a horn on its rear. When the larva begins to develop, the colors change slightly.

The Catalpa Sphinx is actually a common hawk or sphinx moth. It’s the larvae or caterpillar stage that you’re most likely to come across rather than the moth, which is dull and gray in color.