Bug FAQSordid Dart
Euxoa mimallonis · Order: Lepidoptera · Family: Noctuidae
Also called: Ruddy-winged Dart, Sordid Dart Moth
The Sordid Dart moth measures about 38 to 42 mm across the wings. It occurs across North America from Nova Scotia to coastal British Columbia and south to Michigan, Minnesota, central California and New Mexico. The species produces one generation each year.
Source: Wikipedia
How to recognize it
Euxoa mimallonis was first described by Smith in 1890 and belongs to the Noctuidae family.
Source: Wikipedia
Size
Its wingspan ranges from 38 to 42 mm.
Source: Wikipedia
Life cycle
There is one generation per year.
Source: Wikipedia
When you see it
Adults are on the wing from July through September.
Source: Wikipedia
Where it comes from
The moth’s native range covers the same North American region described for its habitat.
Source: Wikipedia
Where it is found in the US
Recorded in 19 of 51 states and DC. Most records: Wyoming, Colorado, Montana, Michigan, California, Washington, Oregon, Arizona.
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
Questions people ask
How many generations does this moth produce each year?
It has one generation per year.
Source: Wikipedia
Same family (Noctuidae)
Ipsilon Dart MothAgrotis ipsilonDamages trees, gardens or crops
Fall Armyworm MothSpodoptera frugiperdaDamages trees, gardens or crops
Army Cutworm MothEuxoa auxiliarisDamages trees, gardens or crops
Large Yellow UnderwingNoctua pronubaDamages trees, gardens or crops
Silver ΥAutographa gamma
American DaggerAcronicta americanaCan irritate skinSources
- Wikipedia: https://en.wikipedia.org/wiki/Euxoa_mimallonis
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.