I watched two of these caterpillars on my porch for a few weeks eating a vine I would have pulled out otherwise. They crawled up to the top of the porch on the same day, even though they originally were different sizes, so probably slightly different ages. One hatched today, but the other never did. I have never seen this type of moth before. I actually like moths even more than butterflies as odd as that may seem. I took the moth outside and that is where I got the good shots of him.