Beekeepers in Ethiopia will hang their bee colonies in trees in areas with driver ants. The best trees are the ones that house another species of ant, Crematogaster chiarinii. Crematogaster chiarinii are much smaller than the driver ants, but defend their territory aggressively. They are quicker than the army ants and work as a team to hold and kill the larger enemies. Interactions between driver ants and Crematogaster chiarinii often result in significant numbers of dead driver ants and a retreat of the swarm from guarded area. Their aggressive defense of their tree protects the bees. Despite its aggression toward driver ants, Crematogaster chiarinii does not attack the bees.
Nuru Adgaba, Awraris G. Shenkute, Ahmed A. Al-Ghamdi, Amenay Assefa, Mohammad J. Ansari, Brian Taylor and Sarah Radloff. 2014. Crematogaster chiarinii ants as a potential biological control agent for protecting honeybee colonies from attack by Dorylus quadratus driver ants in Ethiopia. Agricultural and Forest Entomology. 16, 302–313