Dorymyrmex
Pyramid ants of open, hot ground.
Fast, heat-tolerant ground nesters; keep identification and colony details tentative.
North American Dorymyrmex natural history from genus and species accounts; not a nest-temperature prescription.
Example photograph · Dorymyrmex bicolor · workerPhoto: Peter Chen 2.0 · Source · CC BY 4.0Full original frame; modified: resized and converted to WebP. No retouching. Not your colony or an identification reference.Example species photograph · not an identification reference · not to scaleOpen ground and crater nests
AntWiki describes Dorymyrmex as ground-nesting ants of drier habitats, often nesting in open areas with an irregular mound of loose soil at the entrance. The D. insanus account describes heat-tolerant foragers that recruit quickly to food and take honeydew and other liquids.
Source: AntWiki · Dorymyrmex · AntWiki · Dorymyrmex insanus
In your setup
Field heat tolerance is not an enclosure target. Record measured nest conditions and whether foragers use the food you offer. These are small, fast workers, so check that the setup is escape-proof.
Interactions with fire ants
In a Texas field study, D. flavus increased after imported fire ants were reduced with bait and showed antagonistic behavior toward S. invicta. This is one species in one study, not evidence that pyramid ants control fire ants generally.
Source: Calixto, Harris & Barr (2007) · Resurgence and persistence of Dorymyrmex flavus
Record observations without predicting a flight
In your setup
A winged ant at a nest, a flying swarm and a queen on the ground are different observations. Record the local date, approximate area and identification confidence. This guide does not provide a regional flight forecast.
Build a record for this colony
In your setup
Log dated food responses, reservoir and containment checks, and worker and brood estimates. Mark estimates as estimates and leave unknown facts blank. These notes do not fill in or alter your saved colony profile.
Before acquiring or moving ants
Consult the library’s movement guidance and official sources and the authorities relevant to your location.
Sources and review
Research statements link to their sources. “In your setup” contains practical keeper suggestions, not findings tested for every species. Source check: 2026-10-20.
- AntWiki · Dorymyrmex
Genus overview: ground nesting in dry, open habitats and nest-entrance mounds.
- AntWiki · Dorymyrmex insanus
Species account of foraging, recruitment and nesting in the southwestern US.
- Calixto, Harris & Barr (2007) · Resurgence and persistence of Dorymyrmex flavus
Primary field study of D. flavus and S. invicta after broadcast bait treatment.
Keep your own field notes.
Record care, dated counts and what you observe. Species and counts can stay blank when you do not know them.
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