Bug FAQFreeman's Dart
Diarsia rosaria · Order: Lepidoptera · Family: Noctuidae
The rosy dart moth, Diarsia rosaria, belongs to the Noctuidae family and has a wingspan of about 30 mm (1.2 in). It lives abundantly in wet conifer forests across much of Canada and the north-western United States, from the Atlantic provinces to British Columbia and down to northern California and eastern Oregon.
Source: Wikipedia
How to recognize it
Diarsia rosaria is commonly called the rosy dart and is a moth in the Noctuidae family.
Source: Wikipedia
Size
Its wingspan measures roughly 30 mm, or about 1.2 inches.
Source: Wikipedia
Where it lives
The species is abundant in wet conifer forest habitats.
Source: Wikipedia
What it eats
The caterpillars feed on a variety of grasses.
Source: Wikipedia
Where it comes from
It is found throughout many Canadian provinces and extends south into northern California and eastern Oregon in the United States.
Source: Wikipedia
Where it is found in the US
Recorded in 15 of 51 states and DC. Most records: Oregon, Washington, Alaska, Montana, California, Colorado, Wyoming, Michigan.
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
Questions people ask
Where is the rosy dart moth commonly found?
It lives in wet conifer forests across Canada and the north-western United States, from the Atlantic provinces to British Columbia and down to northern California and eastern Oregon.
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/Diarsia_rosaria
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.