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The Tiny And Terrifying
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Wild Things

Fungus turns ants into zombie puppets

Seriously, it's like a horror movie, but these ants are the stars

By Smartasaurus· 1 min read Wild

Imagine an ant climbing a leaf

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How hard do you think this was for science to crack?

The answer says more about you than about the discovery.

The short version
  • Seriously, it's like a horror movie, but these ants are the stars
  • A stalk pushes out of the back of the dead ant's head a few days later.
  • Somewhere in a rainforest right now, a beetle is climbing somewhere it never meant to go.

A fungus tells a carpenter ant exactly when to die — and the ant obeys.

It's called Ophiocordyceps unilateralis. Spores land on the ant's exoskeleton, drill through the cuticle, and grow inside its body cavity, threading the muscles like wiring through a wall. Within days, the fungus owns the nervous system in ways biologists are still trying to map.

At a precise time of day, the infected ant climbs. It leaves its colony, marches up a stem to a leaf roughly 25 centimetres above the forest floor — almost always on the north side, in the exact humidity the fungus needs to reproduce. Then it bites down on the leaf's main vein and locks its jaws there forever. This is called the "death grip", and the muscles have already been chewed away from the inside, fused in place so the corpse can't fall.

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Sources (2) — tap to view
  1. 1.Hughes et al., 'Behavioral mechanisms and morphological symptoms of zombie ants dying from fungal infection', BMC Ecology
  2. 2.Fredericksen et al., 'Three-dimensional visualization and a deep-learning model reveal complex fungal parasite networks in behaviorally manipulated ants', PNAS
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