Bug FAQSmall Western Green Drake
Drunella coloradensis · Order: Ephemeroptera · Family: Ephemerellidae
The small western green drake is a spiny-crawler mayfly in the family Ephemerellidae. It lives in parts of Central America and North America, including the western United States, Alaska, northern Canada, northern Mexico and the southwestern region.
Source: Wikipedia
How to recognize it
Drunella coloradensis belongs to the spiny crawler mayflies of the family Ephemerellidae.
Source: Wikipedia
Where it comes from
Its range covers Central America and the northern part of North America. In North America it is found in the western United States, Alaska, northern Canada, northern Mexico and the southwestern region.
Source: Wikipedia
Where it is found in the US
Recorded in 10 of 51 states and DC. Most records: Colorado, California, Wyoming, Utah, Washington, Oregon, Alaska, 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
Same family (Ephemerellidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Drunella_coloradensis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-25 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-25.