communication between insects is usually chemical and involves phermomones. A pheromone is a chemical released by an animal that affects the behavior or development of other members of the same species through the sense of smell or taste. Phermones also play a major role in the behavior of insects. When you see ants walking in a line and following one another they are really following a trail of pheromones that each one is leaving behind it to show where to go. Most of these trails by ants that find food as they make their way back to the nest so the nest can get more food for the other ants.