The "army" in their name refers to their predatory raids. Without a central leader or visual coordination, the ants use pheromone trails to organize into massive fan-shaped columns.

This architecture is fluid; it can be disassembled in hours, allowing the colony to remain in constant motion. This nomadism is driven by their sheer consumption. An army ant colony can consist of up to 20 million individuals, requiring a massive amount of protein that no single territory could sustain for long. The Intelligence of the Swarm

Furthermore, by clearing out massive amounts of debris and controlling the populations of other insects, they act as a reset button for the forest floor, ensuring biodiversity by preventing any one species from dominating the leaf litter. The Lesson of the Colony

The army ant is a biological paradox: a formidable apex predator that is virtually blind and lacks a permanent home. Often described as a "superorganism," the army ant represents one of nature’s most extreme examples of collective intelligence, where the individual is nothing and the colony is everything. The Architecture of Motion