Not actually close kin of ants, whom they resemble in behavior, or termites, who they resemble somewhat in appearance. "Giant Ants" are a eusocial variety of Whegg, living in deep, branching burrows deep into the earth. Within an individual colony of giant ants are several different varieties, born to the singular queen for various purposes. there are smaller, industrious workers, and large armored guardian ants, for instance. Giant ants tend to be found far to the south, the entrances to their cavernous burrows in clearings (sometimes clearings of their own design) or fields, near the outskirts of forests and jungles, where they hunt and scavenge.
Rumors state that deep within any giant ant colony is an enormous midden, where the ants dispose of any material they cannot eat. As the ants are often a plague along trade routes, this pile of "trash" could hold untold amounts of treasure picked from the corpses of adventurers and merchants killed by the colony.