Ants build their nests in burrows of their own making under rocks or in fallen trees or decayed and moist wood. Ants can be found almost anywhere in the world with the exception of extremely remote islands and Antarctica.
A colony of ants may have just a few hundred insects, but larger colonies can house millions. Underground ant nests are usually easy to detect by their anthills, small mounds that are used to enter and exit them. Nests can grow quite large and consist of many connected chambers and corridors, and they can take up an acre of land or more.