Bug FAQCold-country Caterpillar Hunter
Calosoma frigidum · Order: Coleoptera · Family: Carabidae
The Cold-country Caterpillar Hunter measures roughly 16 mm to 27 mm in length. Its dorsal pits shine with an iridescent blue-green hue, larger than those of many other Calosoma species. It lives in wooded areas across southern Canada and the United States.
Source: Wikipedia
How to recognize it
The beetle has iridescent blue-green pits that are larger than those of many related species.
Source: Wikipedia
Size
Adults are about 16 mm to 27 mm long.
Source: Wikipedia
Where it lives
It can be found in wooded habitats.
Source: Wikipedia
Where it comes from
Its range includes southern Canada and the United States.
Source: Wikipedia
Where it is found in the US
Recorded in 33 of 51 states and DC. Most records: Virginia, Wisconsin, Utah, New York, Pennsylvania, Michigan, Minnesota, Maine.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
Where does the Cold-country Caterpillar Hunter live?
It lives in wooded areas throughout southern Canada and the United States.
Source: Wikipedia
What are the distinctive markings of this beetle?
Its pits are iridescent blue-green and larger than those of many other Calosoma species.
Source: Wikipedia
Same family (Carabidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Calosoma_frigidum
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.