If you’ve been looking for Monarch caterpillars on Milkweed, but found these instead, here’s the lesser known forager of the milkweed plant. Also known as the Milkweed Tiger caterpillar, Euchaetes egle, this species skeletonizes the leaves of older Milkweed plants. Monarch caterpillars on the other hand prefer younger, more juicy leaves. Although Milkweed Tussock caterpillars turn into nondescript moths they are important as pollinators. (Michigan State University Extension)