> Foraging in a harvester ant colony requires some individual ant memory. The ants search for scattered seeds and do not use pheromone signals [...] This was s

> Foraging in a harvester ant colony requires some individual ant memory. The ants search for scattered seeds and do not use pheromone signals [...] This was surprising to me. Until now, I was under the impression that all ants used pheromones, which leads to coordination not with each other but through the environment [1]. [1] https://en.wikipedia.org/wiki/Stigmergy https://en.wikipedia.org/wiki/Stigmergy