New World Army Ants

There are about 150 species of army ants in the New World (that is, North, South, and Central America), all in the tribe Ecitonini. Although these army ant species are found from Kansas to Argentina, few people in North America realize that there are plenty of army ants living in the United States, in part because the colonies are rarely very abundant, and because the United States species (mostly genus Neivamyrmex) are quite small (~5 mm), with small and generally unobtrusive raiding columns, most often active at night, and easily overlooked.

E. burchellii and E. hamatum are the most visible and best studied of the New World army ants because they forage above ground and during the day, in enormous raiding swarms. Their range stretches from southern Mexico to the northern part of South America.


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