The main goal of this paperwork was to give literary review of determination of castes in ant colonies and different ways of ant communication. Ants are family of insects that belong to the order of Hymenoptera. The live cooperatively in built structures called anthill. They are polymoprh animals which means there are more forms of adults members of species. Which are: a queen, drones, workers and interkastes (example soldier). Ants are build like typical insects: body divided on head, thorax and gastor, six legs, compound eyes and antennae. Mouth organs are for biting and wings are only possesed by drones and queen in mating time. The queen mates only once in a lifetime and after that she lives in an anthill and lays eggs for the rest of her life. All members of the community work for the benefit of the queen and the colony. Ants have populated all continents except for Antarctica and have great ecological importance. They loose the ground, spread the seeds and eat dead organisms. There can be only one queen or more of them in one colony. There is no agression or competition between the queens when there are more than one queen in the colony. Like most of the insects, ants also go through complete metamorphosis which includes the pupa life stage. Juvenile hormone and ecdysone hormone affect how much time will pass before the metamorphosis and the amount of food affects the development of the queen. Ecdysone stimulates the transition from the pupa life stagy to the adult life stage during every moulting and juvenile hormone stops it. Ratio of that two hormones plays a great part in determination of caste of each individual. Ants are eusocial insects and the communicate mutually for the purpose of foraging, division of labor, grouping, defending the colony etc. They communicate with cuticular hydrocarbons, pheromones and by clicking with their mandibule. Chemical composition of CHCs gives specific odor to each colony and with that they can discern members of their colony from others. Pheromones are secreted from glands all over the body and with them they can give other ants informations about the quallity and quantity of food source and its distance from the anthill. Some ant species can undestand pheromone traces of the other ants and use that informations. It is the example of interspecies interaction. In ants they can be mutualistic, parasitic and competitive. Considering their success ofcourse there are also invasive species of ants. The most known are probably the fire red ant Solenopsis invicta and the argentine ant Linepithema humile that cause a great economical damage. Some of the common features of all invasive ants are: reduced agression, polyginy (phenomenon of more than one queen in a colony) , generalistic diet etc. When talking about invasive ants we can also talk about a term supercolony. It is the association of more colonies that cooperate mutually and even exchange their workers and queens. Supercolonies can spread over 2,5 kilometres square and contain 45000 nests , over 300 million workers and over a million queens. One of the largest confirmed supercolonies i the one of the argentine ant. It spread along 6000 kilometres, from the north Italy, over south France to spanish atlantic coast and it contains billions of ants and millions of nests.