Observation notes: The caterpillar hatched from an egg on June 2nd sometime in the morning. The pictures are from about 2 weeks after hatching. It entered its pupal stage on June 20. This caterpillar often remained on the wick of the branch and ate leaves from there so to better mimic a twig. The caterpillar was only seen once on a leaf. It ate Russian elm (Ulmus laevis). When first hatched, it had white stripes that spanned the length of the body from the anal prolegs to the head, one on either side of the body. The stripe soon disappeared, and within a week, the skin appendages/bumps and crown developed as seen in the pictures.