Bug FAQRough Harvester Ant
Pogonomyrmex rugosus · Order: Hymenoptera · Family: Formicidae
Rough Harvester Ants live in open, sandy, hot deserts of the southwestern United States and northern Mexico. Colonies make a small cleared circle around the nest entrance and the ants are red-and-black in the southwest, but fully black farther east. Workers forage by day for seeds and dead insects, and the species mates in nuptial flights from July to September after rain.
Source: Wikipedia
How to recognize it
In the desert southwest the ants are red and black; in central U.S. and Mexico they are all black. Nests have a small cleared circle around the entrance, making them easy to spot.
Source: Wikipedia
Where it lives
They are found in open, sandy, hot areas.
Source: Wikipedia
What it eats
They forage during daylight, collecting seeds and scavenging dead insects.
Source: Wikipedia
Life cycle
Nuptial flights occur from July to September in hot daytime temperatures of 80 to 95 °F, usually after rain the day before.
Source: Wikipedia
When you see it
Mating flights are typical in the summer months of July through September.
Source: Wikipedia
Where it comes from
Their range includes the southwestern United States and northern Mexico.
Source: Wikipedia
Where it is found in the US
Recorded in 16 of 51 states and DC. Most records: New Mexico, California, Texas, Arizona, Utah, Colorado, Nevada, Kansas.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in United States. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
How can I recognize a Rough Harvester Ant nest?
Look for a small cleared circle of bare ground around the nest entrance; ants are red-and-black in the desert southwest and all black farther east.
Source: Wikipedia
Same family (Formicidae)
Eastern Black Carpenter AntCamponotus pennsylvanicusCan damage your home
Red Imported Fire AntSolenopsis invictaCan sting
American Winter AntPrenolepis imparis
Argentine AntLinepithema humileNuisance, not dangerous
Immigrant Pavement AntTetramorium immigransCan sting
Odorous House AntTapinoma sessileCan damage your homeSources
- Wikipedia: https://en.wikipedia.org/wiki/Pogonomyrmex_rugosus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-22 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.