Fire Ants or Red Harvester Ants, got its name for the painful sting they instil in humans, which is a sensation similar to what one feels when burned by fire. Fire ants are native to South America and an invasive species in the United States. One of the adaptations that makes them so hardy is that they can build large structures by linking their bodies together. This is how they form rafts that can float during floods. When they’re aggregated together, fire ants can be seen as a material and the Hu lab at Georgia Tech has been testing that material for years. Fire ants or are known for their ability to organize into remarkable macroscopic structures. They can link their legs together into elastic solids.