There is a fungus that turns ants into "zombies" - Apparently.
Ophiocordyceps unilateralis, a fungus that infects carpenter ants, manipulates their behavior to ensure its own reproduction. Infected ants climb to high locations and bite onto a leaf, producing a fruiting body that releases spores. This fungus essentially turns the ants into "zombies" to spread its own genetic material. This phenomenon was first documented in the 1930s and has since been extensively studied in the Amazon rainforest.