Blunt-haired Mound Ant

Formica obtusopilosa · Order: Hymenoptera · Family: Formicidae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Blunt-haired Mound Ant
Photo: iNaturalist user, CC0

How to recognize it

It belongs to the ant family Formicidae.

Source: Wikipedia

Is it a pest in the house?

It is mentioned only as an ant in the family Formicidae.

Source: Wikipedia

Does it bite or sting?

It is recorded as an ant species in the family Formicidae.

Source: Wikipedia

Where it lives

It is recorded as an ant species in the family Formicidae.

Source: Wikipedia

What it eats

It is identified as an ant belonging to Formicidae.

Source: Wikipedia

Life cycle

It is described as an ant species in the family Formicidae.

Source: Wikipedia

When you see it

It is listed as a member of the ant family Formicidae.

Source: Wikipedia

Where it is found in the US

Recorded in 12 of 51 states and DC. Most records: Colorado, Utah, New Mexico, Nevada, Montana, Wyoming, Idaho, North Dakota.

Darker = more records. Counts are museum and citizen-science records, not population size.

Source: GBIF

Status: native in North America; native in Canada; native in United States. Source: iNaturalist

Months it is reported in the US

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Source: GBIF

More photos

Blunt-haired Mound Ant photo 2
Photo: iNaturalist user, CC0
Blunt-haired Mound Ant photo 3
Photo: iNaturalist user, CC0
Blunt-haired Mound Ant photo 4
Photo: iNaturalist user, CC0
Blunt-haired Mound Ant photo 5
Photo: iNaturalist user, CC0

Same family (Formicidae)

Eastern Black Carpenter AntEastern Black Carpenter AntCamponotus pennsylvanicusCan damage your homeRed Imported Fire AntRed Imported Fire AntSolenopsis invictaCan stingAmerican Winter AntAmerican Winter AntPrenolepis imparisArgentine AntArgentine AntLinepithema humileNuisance, not dangerousImmigrant Pavement AntImmigrant Pavement AntTetramorium immigransCan stingOdorous House AntOdorous House AntTapinoma sessileCan damage your home

Sources

  • Wikipedia: https://en.wikipedia.org/wiki/Formica_obtusopilosa

Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia

Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-24.

How this page works

This is one bug's fact sheet. The colored box at the top says whether it is dangerous. Sections below cover how to recognize it, whether it is a pest, and how to deal with it. The US map shows which states have records; tap a state to see other bugs there.

Every fact on Bug FAQ comes from a named source (university extension sites, government agencies, GBIF, iNaturalist, Wikipedia). The source is linked next to each section. If we have no source for something, we leave it out.