Ants are known as hard workers, tirelessly attending to their assigned tasks—foraging for food, nurturing larvae, digging tunnels, tidying the nest. But in truth, some are total layabouts. Called workerless social parasites, these rare species exist only as queens, and they die without workers to tend to them. To survive, parastic ants infiltrate a colony of closely related ants, where, as long as they keep their numbers relatively low, they and their offspring become the leisure class of the colony.
Click here for original story, Illuminating the evolution of social parasite ants
Source: Phys.org