Bug FAQWestern Catoptria
Catoptria oregonicus · Order: Lepidoptera · Family: Crambidae
The western catoptria has a wingspan of about 17 to 21 mm. It lives in mountain and foothill meadows and is found from British Columbia and Alberta down to Montana, Oregon and northern coastal California. Adults are active from July through early September.
Source: Wikipedia
Size
Wingspan ranges from 17 mm to 21 mm.
Source: Wikipedia
Where it lives
It inhabits meadow areas in mountainous and foothill regions.
Source: Wikipedia
When you see it
Adults are on the wing from July until early September.
Source: Wikipedia
Where it comes from
Its North American range includes British Columbia, Alberta, Montana, Oregon and northern coastal California.
Source: Wikipedia
Where it is found in the US
Recorded in 7 of 51 states and DC. Most records: Montana, Oregon, Idaho, Washington, Alaska, California, Nevada.
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
More photos
Questions people ask
When are western catoptria moths active?
You’ll see the adults flying from July through early September.
Source: Wikipedia
Same family (Crambidae)
Box Tree MothCydalima perspectalisDamages trees, gardens or crops
Celery Leaftier MothUdea rubigalis
Elegant Grass-veneerMicrocrambus elegans
Hawaiian Beet Webworm MothSpoladea recurvalisDamages trees, gardens or crops
Garden Grass-veneerChrysoteuchia culmellaDamages trees, gardens or crops
Bluegrass Webworm MothParapediasia teterrellusDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Catoptria_oregonicus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-28 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-28.