Bug FAQResidua Underwing
Catocala residua · Order: Lepidoptera · Family: Erebidae
Also called: Residua Underwing -Hodges#8785, Residua Underwing Moth
The adult moth has a wingspan of about 60 to 73 mm. It lives across much of eastern North America, from southern Canada down to the Gulf Coast and west to the Midwest. Adults are seen flying from July through September, depending on where they are found.
Source: Wikipedia
Size
Wingspan ranges from 60 mm to 73 mm.
Source: Wikipedia
What it eats
Caterpillars feed on several hickory species, including shagbark, pecan, shellbark and mockernut hickory.
Source: Wikipedia
When you see it
Adults are on the wing between July and September, varying with location.
Source: Wikipedia
Where it is found in the US
Recorded in 31 of 51 states and DC. Most records: Connecticut, Michigan, Pennsylvania, New York, Missouri, Ohio, Illinois, Massachusetts.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
How large is the Residua Underwing?
The moth’s wingspan measures roughly 60 to 73 mm.
Source: Wikipedia
Where is this moth found?
It occurs across eastern North America, from southern Canada down to the Gulf Coast and west to the Midwest.
Source: Wikipedia
When are the adults active?
Adults fly from July through September, depending on the region.
Source: Wikipedia
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/Catocala_residua
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-24.