Anisota stigma
In 3 days ~20% in a week ~40%
Anisota stigma, the spiny oakworm moth, is a moth of the family Saturniidae. The species was first described by Johan Christian Fabricius in 1775. It is found in North America from Massachusetts and southern Ontario to Florida, west to Minnesota, Kansas and Texas.
The wingspan is about 45 millimetres (2 in). The larvae mainly feed on oak, but have also been reported on hazel and basswood. Anisota stigma is the only Anisota species with males known to be attracted to light. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Spiny Oakworm Moth sighting in Great Smoky Mountains National Park on a given day, based on 19 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 250th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
June to September
In those months about 10% of wildlife watchers report a Spiny Oakworm Moth in Great Smoky Mountains National Park on a given day, against under 5% in October to May, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Spiny Oakworm Moth sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Great Smoky Mountains National Park, in our data
Great Smoky Mountains National Park is the only park on Wallace's Line with enough records to rate Spiny Oakworm Moth sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Spiny Oakworm Moth is recorded against all the insects logged in Great Smoky Mountains National Park (19 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.
