Neivamyrmex harrisi. Male army ants are sometimes called "sausage flies" for their distinctive appearance. Pima County, Arizona, USA

A raiding column of Neivamyrmex nigrescens. Huachuca Mountains, Arizona, USA

Neivamyrmex army ants prey primarily on the brood of other ant species, but they will also take adult ants. Here army ants make short work of a Lasius foundress queen they encountered in a subterranean raid. (Neivamyrmex nigrescens). Portal, Arizona, USA