Identify Little Fire Ants

Small ants with important look-alikes

Hawaiʻi Ant Lab describes workers as approximately 1.5 millimeters long, orange, and relatively slow moving. Several other small reddish ants occur in Hawaiʻi. Size and color alone are not sufficient to distinguish them.

A painful sting also does not establish which ant is present. Identification may require a collected specimen examined with magnification; an unclear phone photograph can leave the question unresolved.

Where an observation may start

LFA can nest close to the ground and in vegetation, including palm crowns. An ant found in a plant canopy is therefore worth documenting as carefully as one found in litter or a pot. Avoid disturbing overhead vegetation just to obtain a closer view.

Photograph and label what you find

Our community documentation checklist keeps the record useful without asking you to make a diagnosis. Do not climb a tree or handle stinging ants to improve a photograph.

• Photograph the surrounding plant or material as well as the insect, if this is practical.
• Use a size reference in the image without touching the ant.
• Record the observation date, island, location, and whether the ant was on the ground, on a plant, or in a delivered item.
• If there is a specimen, keep its collection details attached to the record and arrange appropriate identification instructions.
• Keep the observer’s guess and the identifier’s conclusion as separate entries.

Two scientific names in the literature

Hawaiʻi Ant Lab’s August 2026 taxonomy update uses Allomerus auropunctatus. Much older literature and some current guidance use Wasmannia auropunctata. Search both names when comparing papers; the name change does not describe a newly arrived pest.

Keep the report on this website

Use “Report suspected little fire ants” in the related resources to send your observation to this independent community council. Describe whether identification is pending or already confirmed. A community report does not itself confirm the species or automatically become a government report.