Bug FAQBrassy Big-eyed Beetle
Notiophilus aeneus · Order: Coleoptera · Family: Carabidae
The brassy big-eyed beetle is about 5 to 6 mm long and has a dark, brassy sheen with notably large eyes. It lives across North America and the adults are active during the day in spring and summer.
Source: Wikipedia
How to recognize it
It is dark colored with a brassy tint and has large eyes.
Source: Wikipedia
Size
Adults measure roughly 5 to 6 mm in length.
Source: Wikipedia
Where it lives
The species is found in North America.
Source: Wikipedia
When you see it
Adults are active during the day in spring and summer.
Source: Wikipedia
Where it comes from
It is native to North America.
Source: Wikipedia
Where it is found in the US
Recorded in 22 of 51 states and DC. Most records: Tennessee, Massachusetts, Virginia, Wisconsin, Pennsylvania, New Hampshire, Michigan, Vermont.
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
Same family (Carabidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Notiophilus_aeneus
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.