The world's most expensive fungus turns insects into zombies to survive and reproduce

Gardening · Published 3 October 2026 Swipe more like this →

In short: Cordyceps fungi are master manipulators. These endoparasites infect insects, digest them from the inside out, and sprout stalks from their corpses to release spores. While they have inspired pop culture nightmares, they are also highly valued in traditional medicine, with some rare specimens fetching over $100,000 per kilogram.

The genus Cordyceps comprises over 300 species of entomopathogenic fungi found globally, though they are most diverse in Asia. These organisms are specialized hunters; their sticky spores adhere to passing insects, such as beetles, moths, or ants. Once a spore breaches the host's exoskeleton, it germinates threadlike hyphae that consume the insect from within. After the host dies, the fungus erupts, often from the head, to disperse its next generation of spores.

Taxonomic revisions have significantly reshaped our understanding of these fungi. Many species once classified as Cordyceps, including the famous 'zombie-ant fungus' (Ophiocordyceps unilateralis) and the highly prized caterpillar fungus (Ophiocordyceps sinensis), have been moved to other genera like Ophiocordyceps. Despite these changes, the market continues to trade them under their traditional names. Ophiocordyceps sinensis, which parasitizes moth larvae in the Himalayas and Tibet, is considered the world's most expensive fungus, with high-quality specimens reaching $110,000 per kilogram.

These fungi hold a significant place in traditional Chinese and Tibetan medicine, where they are used to treat ailments ranging from lung issues to kidney disease. They are also marketed as wellness supplements for energy, endurance, and anti-inflammatory properties. However, this high demand has led to overharvesting, placing some species at risk. The IUCN Red List now classifies O. sinensis as vulnerable, a status likely to be exacerbated by the ongoing effects of climate change on their high-altitude habitats.

While pop culture, such as the game and show The Last of Us, depicts Cordyceps jumping the species barrier to infect humans, this is purely fictional. Real Cordyceps species are highly host-specific and do not infect humans. Their 'zombie' behavior is a sophisticated evolutionary strategy to ensure spores are released from an optimal vantage point, a process that has been perfected over millions of years in the insect world.

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