Ant Colony Stigmergy

Pheromone trails enable collective intelligence — shortest path emerges without central coordination

Colony

Pheromone

Environment

Ants foraging
Food collected0
Active trails0
Peak pheromone0
Stigmergy: indirect coordination through environmental modification. Ants deposit pheromone when carrying food; shorter paths accumulate more pheromone per unit time, reinforcing the shortest route. Evaporation prevents convergence on suboptimal paths.