Bug FAQGolden Deer Fly
Silvius gigantulus · Order: Diptera · Family: Tabanidae
The golden deer fly, Silvius gigantulus, belongs to the horse-fly family Tabanidae. It occurs in Canada, the United States and Mexico.
Source: Wikipedia
Where it lives
Silvius gigantulus is a horse fly species.
Source: Wikipedia
Where it comes from
It is native to Canada, the United States and Mexico.
Source: Wikipedia
Where it is found in the US
Recorded in 5 of 51 states and DC. Most records: Idaho, California, Washington, Oregon, Montana.
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
Source: GBIF
More photos
Questions people ask
Where is the golden deer fly found?
It lives in Canada, the United States and Mexico.
Source: Wikipedia
Same family (Tabanidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Silvius_gigantulus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-26 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-26.