Bug FAQRotund Idia Moth
Idia rotundalis · Order: Lepidoptera · Family: Erebidae
Also called: Rotund Idia
The rotund idia moth belongs to the litter moth group in the family Erebidae. Its wingspan measures about 20 mm. It lives from southern Canada down through the United States to Florida and Texas, where its larvae eat dead leaves and other detritus.
Source: Wikipedia
Size
The adult’s wingspan is roughly 20 mm.
Source: Wikipedia
What it eats
The caterpillars feed on detritus such as dead leaves.
Source: Wikipedia
Life cycle
In the northern part of its range there is one generation per year, while in the south there are two or more generations.
Source: Wikipedia
Where it comes from
Its range includes southern Canada and the United States down to Florida and Texas.
Source: Wikipedia
Where it is found in the US
Recorded in 33 of 51 states and DC. Most records: Massachusetts, Vermont, North Carolina, Alabama, Maryland, New York, Tennessee, Michigan.
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
Same family (Erebidae)
Spongy MothLymantria disparDamages trees, gardens or crops
Fall Webworm MothHyphantria cuneaDamages trees, gardens or crops
Brown-tail MothEuproctis chrysorrhoeaCan irritate skin
Isabella Tiger MothPyrrharctia isabella
Virginian Tiger MothSpilosoma virginicaCan irritate skin
Salt Marsh MothEstigmene acreaSources
- Wikipedia: https://en.wikipedia.org/wiki/Idia_rotundalis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-23.