Tiny Ants, Big Ants: A Surprising Mutual Grooming Bond in Arizona

Researchers in southeastern Arizona documented an unprecedented interaction where small cone ants climb onto much larger harvester ants to lick and nibble their bodies, including inside open jaws. The grooming may benefit both species—cone ants could feed on tiny particles removed, while harvester ants gain cleaning in hard-to-reach areas. This first-recorded behavior, likened to cleaner fish in the ocean, was observed by Mark Moffett and described in Ecology and Evolution, highlighting how much remains to be learned from natural interactions.