Panamanian Ants

When author Elizabeth Kolbert was traipsing through the jungle in Panama she noticed small paths that crossed the main path every few hundred yards. The paths were made by leaf-cutter ants that make millions, even billions, of trips to fetch greenery for their colonies. Some of these colonies which look like sawdust can ultimately be the same size as a city park. She was warned to stay away from soldier ants. They would leave their jaws in her shin even after they die.