Bug FAQLouise's Underwing
Catocala louiseae · Order: Lepidoptera · Family: Erebidae
Source: Wikipedia
Louise's underwing has a wingspan of about 40 mm (1.6 in). Adults are on the wing in May and sometimes into June.
Source: Wikipedia
How to recognize it
Louise's underwing is a moth in the family Erebidae.
Source: Wikipedia
Size
Its wingspan is about 40 mm (1.6 in).
Source: Wikipedia
Where it lives
It is found only in the United States.
Source: Wikipedia
Life cycle
Adults fly in May and may continue into June.
Source: Wikipedia
Where it is found in the US
Recorded in 6 of 51 states and DC. Most records: Florida, Texas, Georgia, Louisiana, South Carolina, Alabama.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
Source: GBIF
Questions people ask
When are adult Louise's underwings active?
Adults are on the wing in May and sometimes into June.
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 acreaDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Catocala_louiseae
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-28 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-28.