Bug FAQEuxoa castanea
Euxoa castanea · Order: Lepidoptera · Family: Noctuidae
Euxoa castanea is a moth in the Noctuidae family that was first described in 1981. The adult wingspan is about 35 to 38 mm. Adults fly from July to August and the species produces one generation each year.
Source: Wikipedia
Size
The wingspan ranges from 35 to 38 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 August.
Source: Wikipedia
Where it is found in the US
Recorded in 10 of 51 states and DC. Most records: Montana, Colorado, Oregon, Wyoming, South Dakota, Utah, Washington, Idaho.
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
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_castanea
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-27 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-27.