Bug FAQSympistis anweileri
Sympistis anweileri · Order: Lepidoptera · Family: Noctuidae
Sympistis anweileri is a moth with a wingspan of about 30 to 36 mm. It lives in mountainous regions of western North America, from Alberta and British Columbia down to Montana, at elevations between 2,000 and 8,000 feet. Adults are active from mid-July through late August and can be found from the tree-line down into valleys and dry forests.
Source: Wikipedia
Size
The wingspan ranges from 30 to 36 mm.
Source: Wikipedia
When you see it
Adults are on the wing from mid-July to late August.
Source: Wikipedia
Where it comes from
It is native to western North America, occurring in Alberta, British Columbia and Montana.
Source: Wikipedia
Where it is found in the US
Recorded in 6 of 51 states and DC. Most records: Montana, Wyoming, Alaska, Idaho, Oregon, Colorado.
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
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/Sympistis_anweileri
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-28 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-28.