Video
Shakespeare couldn’t write this well:
An Alcon Blue Butterfly Caterpillar drops to the ground after hatching, mimics ant larvae pheromones and sounds, scout ants bring caterpillar to their nursery, caterpillar lives off eating ant larvae for a few years.
Ichneumon Eumerus Wasp somehow locates underground nests with Caterpillar imposters, ants attack wasp, wasp releases pheromones, ants start attacking each other, uncontested wasp injects caterpillar with a single egg.
Caterpillar enters pupa stage and forms chrysalis, if wasp egg is present: wasp larvae hatches, eats developing butterfly, pupates safely withing the hard chrysalis shell, emerges as fully developed wasp.