Territorial behavior has been reported in many orders of insects, particularly among the Odonata, Orthoptera, Hemiptera, Coleoptera, Hymenoptera, Lepidoptera, and Diptera. Although territoriality has been recognized among immature stages as well as in both sexes of adult insects, most of the published reports deal with the reproductive consequences of aggressive interactions among territorial males. Some dominance hierarchies have been described, particularly among cockroaches and megachilid and halictid bees. Lek behavior has also been reported among dragonflies, butterflies, and Hawaiian drosophilids. In all the species studied, territorial behavior spreads males through a habitat, minimizing intruder interference with courtship and mating, and increasing the probability that females will be mated. Besides these intraspecific effects, however, aggressive behavior towards unrelated species may reverberate through the larger community. For example, repeated attacks by aggressive files may cause pollinating bees and aphidophagous predators to change their foraging routes, and thus prevent them from servicing particular habitats.