Bug FAQHalf-ringed Acleris Moth
Acleris semiannula · Order: Lepidoptera · Family: Tortricidae
The half-ringed Acleris moth has a wingspan of about 12 to 15 mm. It lives across North America. Its caterpillars eat red maple, silver maple and white oak, and adults can be seen flying any time of year.
Source: Wikipedia
Size
Wingspan ranges from 12 mm to 15 mm.
Source: Wikipedia
Where it lives
Found throughout North America.
Source: Wikipedia
What it eats
Larvae feed on red maple (Acer rubrum), silver maple (Acer saccharinum) and white oak (Quercus alba).
Source: Wikipedia
When you see it
Adults have been recorded on the wing throughout the year.
Source: Wikipedia
Where it comes from
Native to North America.
Source: Wikipedia
Where it is found in the US
Recorded in 19 of 51 states and DC. Most records: New Hampshire, Michigan, Massachusetts, New Jersey, Maine, Connecticut, Vermont, Ohio.
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
When are adult half-ringed Acleris moths active?
Adults can be seen flying at any time of year.
Source: Wikipedia
Same family (Tortricidae)
Oblique-banded Leafroller MothChoristoneura rosaceanaDamages trees, gardens or crops
Garden TortrixClepsis peritanaDamages trees, gardens or crops
Common MarbleSyricoris lacunanaDamages trees, gardens or crops
Red-banded Leafroller MothArgyrotaenia velutinanaDamages trees, gardens or crops
Light Brown Apple MothEpiphyas postvittanaDamages trees, gardens or crops
Aster and Reddish Eucosma Moths and AlliesEucosma parmatanaSources
- Wikipedia: https://en.wikipedia.org/wiki/Acleris_semiannula
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-27 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-26.