Bug FAQChoristostigma plumbosignalis
Choristostigma plumbosignalis · Order: Lepidoptera · Family: Crambidae
Choristostigma plumbosignalis is a Crambidae moth with a wingspan of about 20 to 21 mm. It lives in grassland coulees, aspen parkland, boreal forest woods and mountainous areas across western and central North America, from British Columbia and Alberta down to Arizona and New Mexico and east to South Dakota. Adults are on the wing from June to August.
Source: Wikipedia
How to recognize it
Choristostigma plumbosignalis belongs to the moth family Crambidae.
Source: Wikipedia
Size
The moth’s wingspan measures roughly 20 to 21 mm.
Source: Wikipedia
Where it lives
It is found in grassland coulees, aspen parkland, boreal forest woodlands and mountainous areas.
Source: Wikipedia
When you see it
Adults fly from June through August.
Source: Wikipedia
Where it is found in the US
Recorded in 9 of 51 states and DC. Most records: Colorado, Montana, Wyoming, Utah, New Mexico, Arizona, Idaho, South Dakota.
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 does this moth live?
It occurs in grassland coulees, aspen parkland, boreal forest woods and mountainous areas across western and central North America, from British Columbia and Alberta to Arizona, New Mexico and east to South Dakota.
Source: Wikipedia
What family does Choristostigma plumbosignalis belong to?
It is a member of the moth family Crambidae.
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/Choristostigma_plumbosignalis
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.