Bug FAQLong-beaked Donacaula Moth
Donacaula longirostrallus · Order: Lepidoptera · Family: Crambidae
The forewings measure about 22 to 28 mm in length. It occurs across North America, with records from Canadian provinces such as Nova Scotia, Ontario and Quebec and many U.S. states including Florida, Texas and Maine. Adults are active from May through September.
Source: Wikipedia
Size
Forewing length ranges from 22 to 28 mm.
Source: Wikipedia
When you see it
Adults have been observed on the wing between May and September.
Source: Wikipedia
Where it comes from
The species is found in North America, recorded in several Canadian provinces and many U.S. states.
Source: Wikipedia
Where it is found in the US
Recorded in 23 of 51 states and DC. Most records: Michigan, Maryland, New Jersey, New Hampshire, Maine, Massachusetts, South Carolina, Tennessee.
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
More photos
Questions people ask
When are adult Long-beaked Donacaula Moths active?
Adults are on wing from May through 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/Donacaula_longirostrallus
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.