Figure 40.8: A Foraging Trip by a Worker Ant of a Desert Ant Species (Cataglyphis) The worker’s outbound trip consists of a series of segments as the ant wanders the desert surface seeking dead bodies of heat-killed insects. At any point, however, the ant can return to its home nest quickly in a straight line. The ants accomplish this task with a brain that weighs 0.1 milligram!