Bug FAQCalosoma affine
Calosoma affine · Order: Coleoptera · Family: Carabidae
Calosoma affine is a ground beetle belonging to the Carabinae subfamily. It lives in Mexico and the southern United States, favoring pastures, cultivated fields and sand dunes. It preys on lepidopteran caterpillars.
Source: Wikipedia
How to recognize it
Calosoma affine is a ground beetle in the Carabinae subfamily.
Source: Wikipedia
Where it lives
It inhabits pastures, cultivated fields and sand dunes.
Source: Wikipedia
What it eats
It feeds on lepidopterous caterpillars.
Source: Wikipedia
Where it is found in the US
Recorded in 11 of 51 states and DC. Most records: Kansas, Colorado, Arizona, California, Texas, New Mexico, Utah, Oklahoma.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
Same family (Carabidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Calosoma_affine
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.