Milkweed Tussock Moth Caterpillar (Euchaetes egle). This caterpillar just might alarm you if you’re growing milkweed with Monarch Butterflies in mind. No need to worry though. The Milkweed Tussock Moth and the Monarch Butterfly have grown up in the “same neighborhood” side by side, sharing the bounty. Both butterfly and moth caterpillars are eating a…