Camponotus semitestaceus

Camponotus semitestaceus · Order: Hymenoptera · Family: Formicidae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Camponotus semitestaceus
Photo: iNaturalist user, CC0

Camponotus semitestaceus is a carpenter ant that lives in the western United States and nearby regions. It is also found in British Columbia, Baja California, and possibly Veracruz.

Source: Wikipedia

Where it lives

It lives in the western United States and adjacent areas.

Source: Wikipedia

Where it is found in the US

Recorded in 7 of 51 states and DC. Most records: California, Nevada, Washington, Arizona, Texas, Oregon, Colorado.

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

JFMAMJJASOND

Source: GBIF

More photos

Camponotus semitestaceus photo 2
Photo: iNaturalist user, CC0
Camponotus semitestaceus photo 3
Photo: B. Phalan, CC BY
Camponotus semitestaceus photo 4
Photo: Ken-ichi Ueda, CC BY
Camponotus semitestaceus 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/Camponotus_semitestaceus

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.