Originally the butterfly mod was supposed to be a simple mod that adds butterflies to the world. It’s growing a little beyond that, with the butterflies actually having a complete life cycle. Unfortunately it’s actually pretty rare that a player will stumble upon a caterpillar right now.
We finally implement the chrysalis and complete the life cycle of the butterfly. Butterflies lay eggs. Eggs hatch into caterpillars. Caterpillars create a chrysalis. Butterflies hatch out of a chrysalis. The circle of life is complete.