Bug FAQImmaculate Idia Moth
Idia immaculalis · Order: Lepidoptera · Family: Erebidae
Also called: Immaculate Idia
The immaculate idia moth has a wingspan of about 35 to 39 mm. Adults fly from June through August. It lives in North America, from California eastward across Montana into southern Alberta and Saskatchewan.
Source: Wikipedia
How to recognize it
Idia immaculalis, called the immaculate idia, belongs to the litter moth group in the Erebidae family.
Source: Wikipedia
Size
Its wingspan ranges from 35 to 39 mm.
Source: Wikipedia
When you see it
Adults are on the wing between June and August.
Source: Wikipedia
Where it comes from
Its native range includes North America, covering states like California and provinces such as Alberta and Saskatchewan.
Source: Wikipedia
Where it is found in the US
Recorded in 12 of 51 states and DC. Most records: Wyoming, Montana, Oregon, New Mexico, Colorado, Texas, Idaho, Mississippi.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in United States; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
Questions people ask
Where can I find immaculate idia moths?
They occur in North America from California eastward across Montana into southern Alberta and Saskatchewan.
Source: Wikipedia
Same family (Erebidae)
Spongy MothLymantria disparDamages trees, gardens or crops
Fall Webworm MothHyphantria cuneaDamages trees, gardens or crops
Brown-tail MothEuproctis chrysorrhoeaCan irritate skin
Isabella Tiger MothPyrrharctia isabella
Virginian Tiger MothSpilosoma virginicaCan irritate skin
Salt Marsh MothEstigmene acreaDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Idia_immaculalis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-27 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-27.