There is a fungus that turns ants into zombies. Specific species of fungus attack specific species of ants.

The fungus spore attaches to and penetrates the exoskeleton. It proceeds to force the ant to go a humid microclimate beneficial to the fungus using a mind controlling chemical cocktail.

Once there the fungus forces the ant to sink its jaws in to the north side of a plant and wait to die.

The fungus continues to use the ant as food and 7 days later sends a fruiting body out of the through the base of the ant’s head where it can launch new spores.