Carebara has one of the most pronounced size differences among nestmate workers of any ant. Rossville, Queensland, Australia
Worker polymorphism in the marauder ant Carebara affinis. Pictured here is a single supermajor worker, two major workers, and full complement of minor workers. These insects are all sisters and are essentially genetically identical, their different morphologies a result of developmental plasticity. Rossville, Queensland, Australia
Friend or Foe? Two workers of the tree ant Liometopum luctuosum check each other out. Mojave National Preserve, California, USA
