Polyergus breviceps (Emery, 1893)
Extraordinary and fascinating species of ant characterized as engaging in dulosis, i.e., “slave making;” an obligate parasite that conducts slave raids of three other ant species in order to survive, having completely lost the ability to care for itself (including no longer being able to feed itself) or raise young on their own. Evolution of the mandibles over time have made this species adept at attacking and enslaving others and incapable of a free-living existence. One Polyergus queen alone may take over and subdue an entire colony of another species within one hour by pheromone masking after killing the resident queen. Workers also engage in slave-making raids by removing the pupa of other species to their own colony to be reared as slaves. Another example of the incredible complexity of evolution and diversity of speciation.