the deserts and drylands of the southwestern United States and northern Mexico
Fine-art photographic collection
Pogonomyrmex rugosus
A desert seed harvester that forages close to lethal heat and defends its stores with an exceptionally painful sting.
About this species
Rough Harvester Ant
Pogonomyrmex rugosusEmery, 1895
Information reviewed15 July 2026
Pogonomyrmex rugosus forms large colonies in open desert ground. Workers collect seeds along radiating foraging routes, carry them to underground stores and clear conspicuous areas around the nest entrance.
Taxonomy
Animalia · Arthropoda · Insecta · Hymenoptera · Formicidae · Pogonomyrmex
Accepted taxon. · checked 2026-07-15
the deserts and drylands of the southwestern United States and northern MexicoBroad range and selected reference localities — not a complete occurrence map.
Hot open desert, sandy flats, grassland and scrub.
Foraging is timed around extreme surface temperatures.
Primarily seeds, supplemented by dead arthropods.
Large perennial colonies with a queen and thousands of workers.
What makes this species remarkable?
Workers operate only a few degrees below lethal body temperature, so daily foraging can stop abruptly when desert ground becomes too hot.
The colony harvests and stores vast numbers of seeds underground, while cleared nest discs and foraging trails visibly reshape the desert surface.
Its sting evolved largely against vertebrate predators and delivers venom powerful enough to make small mammals rapidly abandon an attack.