Problema byssus
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Byssus Skipper sighting in Chicago on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 602nd most-seen of the 978 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Byssus Skipper in Chicago on a given day, so our monthly data shows no clear season.
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 Chicago, in our data
Chicago is the only city on Wallace's Line with enough records to rate Byssus Skipper sightings: under 5% 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 Chicago (family Hesperiidae, Skippers) are Fiery Skipper (about 10%), Peck's Skipper (about 10%) and Silver-Spotted Skipper (about 10%), 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 Chicago (16 verified sightings), 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.
