Caterpillar fungus turns caterpillars into zombies by taking over their bodies and brains and using their bodes as nourishment and housing for their spores. The fungus is a highly-prized medicinal ingredient in Chinese medicine. Over-harvest of the fungus in Tibet and climate change are possibly driving the fungus to commercial extinction.
The Tibetan Caterpillar Fungus Is in Trouble - The Atlantic
The Tibetan Caterpillar Fungus Is in Trouble - The Atlantic