Lithacodes fasciola
In 3 days ~20% in a week ~40%
Lithacodes fasciola, the yellow-shouldered slug or ochre-winged hag moth, is a moth of the family Limacodidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | Dallas | 🇺🇸 United States | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Washington | 🇺🇸 United States | |
| 5 | New York City | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Yellow-Shouldered Slug Moth sighting in Shenandoah National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 325th most-seen of the 723 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.
May–July and September
In those months about 10% of wildlife watchers report a Yellow-Shouldered Slug Moth in Shenandoah National Park on a given day, against under 5% in August and October–April, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Yellow-Shouldered Slug Moth sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Among the best
Of the 2 parks where we can rate Yellow-Shouldered Slug Moth sightings, Shenandoah National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Great Smoky Mountains National Park (United States, about 10%).
Same family: Limacodidae
The closest relatives of the Yellow-Shouldered Slug Moth that you can see in Shenandoah National Park (family Limacodidae, Slug Caterpillar Moths) are Skiff Moth (about 10%), Crowned Slug Moth (about 10%) and Smaller Parasa Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-Shouldered Slug Moth is recorded against all the insects logged in Shenandoah National Park (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.
