western harvester ant
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Hymenoptera
- family: Formicidae
- genus: Pogonomyrmex
- species: Pogonomyrmex occidentalis
San Jacinto
California- Akron
- Alamosa
- Boulder
- Buena Vista
- Burlington
- Carbondale
- Cañon City
- Cedaredge
- Conejos
- Cortez
- Craig
- Delta
- Denver
- Eads
- Eagle
- Fort Morgan
- Fowler
- Fruita
- Glenwood Springs
- Golden
- Granby
- Greeley
- Julesburg
- Lamar
- Las Animas
- Limon
- Loma
- Manitou Springs
- Meeker
- Montrose
- Rifle
- Rocky Ford
- Roxborough Park
- Salida
- Steamboat Springs
- Sterling
- Wray
Colorado- Glenns Ferry
- Parma
- Pocatello
Idaho- Gering
- Harrison
- Scottsbluff
- Terrytown
Nebraska- Carlin
- Carson City
- Ely
Nevada- La Grande
- The Dalles
Oregon- Fort Pierre
- Pierre
South Dakota- Dallesport
Washington- Casper
- Green River
- Pine Bluffs
Wyoming
United States