These are fairly large, single-node species, with colors ranging from black to brown to reddish, or combinations of these colors. They rarely invade structures, but are common in wooded or grassy areas outdoors. They cannot sting, but they will readily bite to cause a slight opening in the skin, and then spray formic acid onto the bite wound to cause a stinging sensation. Their common names are derived from their habit of creating large above-ground mounds of vegetation with their colony nesting inside. The field ants are particularly fond of sweet materials and will forage for honeydew. However, they also are fierce predators of other insects
Control of most ants includes correction of the attractions that drew them to a property, including harborage sites, food sources, and moisture conditions. Elimination of insects that provide protein or honeydew sources reduces ant foraging in an area, very important for this species, and cleanup of unnecessary debris or objects on the soil that provide harborage eliminates nesting. Ant bait products in granular, liquid, or gel formulations can be highly effective if the ants accept the bait. If the visible mounds of this species can be found it can be treated directly with a dust or liquid insecticide.