Scientists have discovered four species of fungus that can infect an ant, take over its brain, and force the insect to move to a location where it can spread spores. A stalk of the newfound fungus species Ophiocordyceps camponoti-balzani, grows out of a "zombie" ant's head. Originally thought to be a single species, called Ophiocordyceps unilateralis, the fungus is actually four distinct species—all of which can "mind control" ants. "This potentially means thousands of zombie fungi in tropical forests across the globe await discovery."

Attack of the killer fungi - Planet Earth Attenborough BBC wildlife