Apparently True

There is a fungus that turns ants into "zombies"

Ophiocordyceps unilateralis, a fungus that infects carpenter ants, manipulates the ant's behavior to facilitate its own reproduction. Infected ants will climb to high locations, bite onto a leaf, and produce spores that can spread the fungus. This fungus essentially turns the ant into a "zombie" to ensure its own survival. Researchers have studied this fungus to better understand the complex relationship between fungi and insects.