Problema byssus
In 3 days ~30% in a week ~60%
Problema byssus, the byssus skipper or bunchgrass skipper, is a butterfly of the family Hesperiidae. It is found along the Atlantic coastal plain of North America, from North Carolina south to Florida and the Gulf States and from northern Indiana west to Iowa and south to Missouri and Kansas.
The Byssus Skipper is a medium-sized butterfly with a wingspan ranging from 3.7 to 4.6 cm. Its upper wings are bright yellow-orange bordered with black, giving the illusion of a central patch. The underside of the forewings maintains the yellow-orange hue, while the hindwings are dull yellow in males and rust-colored in females. A band of pale spots is typically visible on the hindwings. [1][2]
The wingspan is 37–46 mm. The larvae feed on Tripsacum dactyloides. eggs laid singly on host plant leaves larvae feed on eastern gammagrass (Trypsacum dactyloides) and big bluestem (Andropogon gerardii) sheltering in silk-tied leaves
pupation occurs in leaf litter within silk cocoons adult diet: nectar from various wildflowers, including pickerelweed flight periods: midwest - one brood from June to July southeast - two broods from May to September, occasionally... 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 | Chicago | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Byssus Skipper sighting in Congaree National Park on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 84th 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 60%, if each day is a fresh chance.
August
In that month about 40% of wildlife watchers report a Byssus Skipper in Congaree National Park on a given day, against under 5% in October to July, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Byssus 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 Byssus Skipper sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Hesperiidae
The closest relatives of the Byssus 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 Byssus Skipper is recorded against all the insects logged in Congaree National Park (13 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.
