Nastra lherminier
In 3 days ~30% in a week ~50%
Nastra lherminier, the swarthy skipper, is a species of grass skipper in the butterfly family Hesperiidae. It is found in Central America and North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Congaree National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Swarthy Skipper sighting in Congaree National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 99th most-seen of the 145 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
September
In that month about 30% of wildlife watchers report a Swarthy Skipper in Congaree National Park on a given day, against under 5% in July and October–May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Swarthy Skipper sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Congaree National Park, in our data
Congaree National Park is the only park on Wallace's Line with enough records to rate Swarthy Skipper sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Hesperiidae
The closest relatives of the Swarthy Skipper that you can see in Congaree National Park (family Hesperiidae, Skippers) are Clouded Skipper (about 30%), Mastor aesculapius (about 30%) and Zabulon Skipper (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Swarthy Skipper is recorded against all the insects logged in Congaree 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.
