Bug FAQSpun Glass Slug Moth
Isochaetes beutenmuelleri · Order: Lepidoptera · Family: Limacodidae
Also called: Beutenmueller's Slug Moth
Source: Wikipedia
Adults have a wingspan of about two centimeters. They are active from June through August.
Source: Wikipedia
Size
The moth’s wingspan ranges from 19 to 24 mm.
Source: Wikipedia
What it eats
The caterpillars feed on oak and beech leaves.
Source: Wikipedia
When you see it
Adults are on the wing from June through August.
Source: Wikipedia
Where it is found in the US
Recorded in 23 of 51 states and DC. Most records: Alabama, Texas, Maryland, Georgia, Tennessee, Ohio, Louisiana, Florida.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in United States. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
Same family (Limacodidae)
Saddleback Caterpillar MothAcharia stimuleaCan sting
Spiny Oak-slug MothEuclea delphiniiVenomous
Yellow-shouldered Slug MothLithacodes fasciolaDamages trees, gardens or crops
Skiff MothProlimacodes badiaDamages trees, gardens or crops
Crowned Slug MothIsa textulaDamages trees, gardens or crops
Yellow-collared Slug MothApoda y-inversaDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Isochaetes_beutenmuelleri
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-23.