Bug FAQSteniodes declivalis
Steniodes declivalis · Order: Lepidoptera · Family: Crambidae
The adult moth has a wingspan of about 13 mm. It occurs in Panama, Costa Rica and Venezuela and looks similar to Steniodes gelliasalis but is smaller, darker and has a distinct, sharply angled whitish outer line on the hindwings that reaches the margin.
Source: Wikipedia
How to recognize it
Adults are smaller and darker than Steniodes gelliasalis, with a distinct, sharply angled whitish outer line on the hindwings that touches the outer margin.
Source: Wikipedia
Size
Wingspan measures roughly 13 mm.
Source: Wikipedia
Where it comes from
Found in Panama, Costa Rica and Venezuela.
Source: Wikipedia
Lookalikes
It can be confused with Steniodes gelliasalis, but can be distinguished by its smaller size, darker coloration, and the sharp, whitish outer line on the hindwings.
Source: Wikipedia
Where it is found in the US
Recorded in 1 of 51 states and DC. Most records: Texas.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
How can I tell Steniodes declivalis apart from similar moths?
Look for a smaller, darker moth with a sharply angled whitish line on the hindwing edge that reaches the margin.
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/Steniodes_declivalis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-24.