Neotropical Army Ants, Ecuador (IMAGE) Field Museum Caption Neotropical army ants are top predators in terrestrial ecosystems, with swarm raids that often contain hundreds of thousands of individuals cooperating to hunt, kill, and transport their prey. Credit © Alex Wild Usage Restrictions Image may only be used in relation to news stories related to this piece of research. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.