Chemical communication in insects is social signalling between insects of the same or different species, using chemicals. These chemicals may be volatile, to be detected at a distance by other insects' sense of smell, or non-volatile, to be detected on an insect's cuticle by other insects' sense of taste. Many of these chemicals are pheromones, acting like hormones outside the body.
Among the many functions of chemical communication are attracting mates, aggregating conspecific individuals of both sexes, deterring other individuals from approaching, announcing a new food source, marking a trail, recognizing nest-mates, marking territory and triggering aggression.
