Bug FAQLotisma trigonana
Lotisma trigonana · Order: Lepidoptera · Family: Copromorphidae
The adult has a wingspan of roughly 14 to 22 mm. The caterpillars feed on salal (Gaultheria shallon) and have also been found on cranberry plants.
Source: Wikipedia
Size
Adults measure about 14 to 22 mm across the wings.
Source: Wikipedia
What it eats
Larvae eat the leaves of salal (Gaultheria shallon). They have also been recorded feeding on cranberry.
Source: Wikipedia
Where it comes from
Found on the Pacific shoreline from Alaska to Costa Rica.
Source: Wikipedia
Where it is found in the US
Recorded in 4 of 51 states and DC. Most records: California, Washington, Alaska, Oregon.
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
What do the larvae eat?
The larvae feed on salal (Gaultheria shallon) and have also been observed on cranberry plants.
Source: Wikipedia
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Lotisma_trigonana
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 2026-10-27.