Bug FAQDiarsia esurialis
Diarsia esurialis · Order: Lepidoptera · Family: Noctuidae
Diarsia esurialis is a moth in the Noctuidae family with a wingspan of about 33 mm. It lives in wet coastal forests along the western North American coast from Alaska and British Columbia down to California. The larvae feed on hazel and alder leaves, and adults are active in midsummer.
Source: Wikipedia
How to recognize it
Diarsia esurialis belongs to the moth family Noctuidae.
Source: Wikipedia
Size
Its wingspan measures about 33 millimeters.
Source: Wikipedia
Where it lives
It is commonly found in wet coastal forests.
Source: Wikipedia
What it eats
The caterpillars eat the leaves of hazel and alder trees.
Source: Wikipedia
Life cycle
Adults fly in midsummer.
Source: Wikipedia
When you see it
The species is on the wing during midsummer.
Source: Wikipedia
Where it comes from
In North America it occurs from Alaska and British Columbia down through Washington, Oregon and California.
Source: Wikipedia
Where it is found in the US
Recorded in 5 of 51 states and DC. Most records: Oregon, Washington, Alaska, California, Montana.
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
Same family (Noctuidae)
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- Wikipedia: https://en.wikipedia.org/wiki/Diarsia_esurialis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-26 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-26.