The Monarchs Are Coming to Acton Nature Center. Spend the day with us and learn the life cycle of the amazing Monarch Butterfly. The King of the Butterflies is currently in the midst of its epic migration from southern Canada to the mountains of Central Mexico. We will introduce you to the Monarch Watch Program that has studied this incredible Butterfly for twenty years. You’ll be assisted on how to tag Monarchs. LONG PANTS AND CLOSED TOES SHOES ARE RECOMMENDED ATTIRE.