The emperor moth is a large moth species known for its spectacular wings and unique life cycle. The wings can extend up to 20 to 30 centimeters, making it one of the largest species of moths with wings. The larval stage is spent in a very narrow cocoon, and when they are ready to transform into adults, they must pass through a cocoon opening that is relatively small to their own body. For them, it is a huge challenge because only through this difficult process can the wings obtain sufficient blood supply and thus acquire the ability to fly. The mouthparts of adult insects will degrade after metamorphosis, so they cannot eat and can only rely on the energy stored during the larval stage for survival.