Argentine ants can develop enormous populations, with large colonies comprised of many nests containing hundreds of queens and many thousands of workers. Individual colony members move freely between and within these nests. Queens lay as many as 60 eggs per day.
Argentine ants are difficult to control within structures on a long-term basis. When colonies are eliminated from a building, new colonies quickly move into the area. Surveys should be made inside and outside buildings to locate all colonies. Argentine ant nests are located in moist, but not wet, areas. Indoors, they are usually near water pipes, sinks, and potted plants. Outdoors, nesting sites include under stones and boards, beneath plants, in fallen and rotting tree limbs, in tree stumps and along sidewalks.