Field Ant


The field ant is the most common ant in Wisconsin and is noted for producing large mounds that can ruin the aesthetics of home lawns, make lawn mowing difficult, and interfere with the growth of plants.

Fast Facts

Color Their color can vary; some species are black, while others are a combination of black and red.
Size Field ants are medium to large ants, ranging in size from 1/8 – 1/4″ in length.
Appearance Rounded front and backside.


Field ants DO NOT come indoors for food. They exclusively collect food outdoors and feed on live and dead insects, as well as sugar, grease, honeydew, sweets, spilled liquids.


Nests in fields, yards, along fences, near trees and houses.


Field ant colonies can survive for 10 or more years. Each colony contains a queen ant that lays all of the eggs that develop into sterile females (workers) and males (drones).


Field ants most commonly cause problems when they produce mounds, the above-ground portions of their colonies/nests. Mounds can be three to four feet wide and over two feet tall. Mounds are unsightly, can prevent turf growth and can be a hazard when lawns are mowed. If disturbed, field ants can give painful, pinch–like bites to people and pets.

Field Ant Control

There is no need to control field ants in areas where there is no human activity. If colonies occur in landscape settings, the only way to eliminate the colony is to kill the queen. The challenge is that in large mounds, the queen can be as deep as two to three feet underground. Thus, surface insecticide treatments will not be effective.