Harvester ants are ret to brown to black in color. They are a larger ant; 1/5 to 1/2 of an inch long. They have two nodes (bumps between the middle and rear body sections). The workers of harvester ants vary in size. Harvester ants have a row of long hairs on the underside of their head. They may also have spines on the back that are sometimes present.
Nests of the harvester ants appear as flat, bare, circular patches of soil averaging several feet in diameter. Their nests may be several feet deep as well.