Phyllodesma americana
In 3 days ~20% in a week ~30%
Phyllodesma americana, the American lappet moth, is a moth of the family Lasiocampidae. It is found from Nova Scotia to northern Florida, west through Texas to California, north to British Columbia and Yukon. The wingspan is 29–49 mm. Adults are on wing from March to September in two generations in the south. In eastern Ontario, adults are on wing from May to July. The flight season in Ohio is from April to August. There is one generation per year in the northern part of the range.
The larvae feed on the leaves of Alnus, Betula, Quercus, Populus, Salix, Ceanothus velutinus, Chrysolepis chrysophylla and Rosoideae species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Bear Rainforest | 🇨🇦 Canada | |
| 2 | Olympic National Park | 🇺🇸 United States | |
| 3 | Acadia National Park | 🇺🇸 United States | |
| 4 | Great Smoky Mountains National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report an American Lappet Moth sighting in Great Bear Rainforest on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 124th most-seen of the 235 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
April to June
In those months about 10% of wildlife watchers report an American Lappet Moth in Great Bear Rainforest on a given day, against under 5% in July to March, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most American Lappet Moth sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
Yes
Of the 4 parks where we can rate American Lappet Moth sightings, Great Bear Rainforest has the highest daily chance: about 10%. Next come Olympic National Park (United States, about 10%) and Acadia National Park (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the American Lappet Moth is recorded against all the insects logged in Great Bear Rainforest (11 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
