Her nest breached by attacking Forelius nigriventris (at right), a fire ant adopts typical defensive position: stinger raised and exuding a droplet of volatile venom. Santiago del Estero, Argentina
Forelius nigriventris attacking a fire ant worker (Solenopsis invicta). Santiago del Estero, Argentina
A nest of Forelius nigriventris in the Paraguayan chaco. Mcal. Estigarribia, Paraguay