The Ant Leaves the Safety of the Nest
When an Ophiocordyceps fungus infects a jungle ant, the parasite can alter the ant’s behavior in ways that carry it away from its colony. Infected ants may climb vegetation and clamp their jaws onto a leaf or stem in a tight “death grip.” The grip anchors the ant as it dies, often in a spot that gives the fungus favorable conditions to grow and spread.
This is more than a strange final pose: an ant that dies on the forest floor or is carried back into the nest may be a poor launch point for the parasite. A corpse fixed to a plant can instead remain exposed to the surrounding air and vegetation.
A Corpse Becomes a Spore Dispenser
After the ant dies, the fungus grows through its body. It can then produce a stalk or other spore-bearing structure that emerges from the corpse. Spores released from that growth can land on other ants; if a spore attaches and successfully infects one, the cycle begins again.
The exact effects vary among fungus–ant pairs, but the broad consequence is a change in the ant’s behavior followed by the fungus using its body to reproduce. The infected ant’s grip is therefore the link between two stages of the parasite’s life: getting its host into a useful position, then spreading spores from there. In the forest, a tiny ant clamped to a leaf can become the starting point for the fungus’s next infection.
