Bug FAQLasionycta promulsa
Lasionycta promulsa · Order: Lepidoptera · Family: Noctuidae
Lasionycta promulsa lives from Rampart House in northern Yukon across to southwestern British Columbia and down to southern New Mexico in the Rocky Mountains. Adult moths are on the wing from about mid-July through August.
Source: Wikipedia
Life cycle
Adults are active from mid-July to August.
Source: Wikipedia
When you see it
The flight period for adults spans mid-July through August.
Source: Wikipedia
Where it comes from
Its range extends from northern Yukon through southwestern British Columbia to southern New Mexico in the Rockies.
Source: Wikipedia
Where it is found in the US
Recorded in 5 of 51 states and DC. Most records: Wyoming, Montana, Colorado, Utah, Washington.
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
When are Lasionycta promulsa adults active?
Adults are on the wing from mid-July through August.
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/Lasionycta_promulsa
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.