If you see one, there are probably more hiding. Ants form colonies that range in size from a few dozen predatory individuals living in small natural cavities to highly organized colonies that may occupy large territories and consist of millions of individuals. If you have ants, there is a potential for food or open wound contamination, as they spread bacteria and a large number of disease-causing organisms. Common in SWFL:  Fire, Carpenter, and Big-Headed Ants.