Argentine ant paralleled only by human society", and had probably been spread and maintained by human travel. They have been extraordinarily successful, in part, because different nests of the introduced Argentine ants seldom attack or compete with each other, unlike most other species of ant. In their introduced range, their genetic makeup is so uniform that individuals from one nest can mingle in a neighboring nest without being attacked. Thus, in most of their introduced range, they form supercolonies. "Some ants have an extraordinary social organization, called unicoloniality, whereby individuals mix freely among physically separated nests. This type of social organization is
Ant mimicry call of ants so they can integrate themselves into the nest. In "A. dentatis" the tubercles release the mimicking pheromone which elicits "A. caprensis" to care for the mimics as they would their own brood. In these relationships worker ants give the same preference to the Lycaenid's as they do to their own brood, demonstrating that chemical signals produced by the mimic are indistinguishable to the ant. This process is also used by larvae of the European Lycaenid species "Phengaris rebeli" which live in the nests of "Myrmica" ants and feed on their ant brood. Wasmannian mimicry occurs when two