Erynnis brizo
In 3 days ~30% in a week ~50%
Erynnis brizo, the sleepy duskywing or banded oak duskywing, is a species of Hesperiidae butterfly that occurs throughout North America and is commonly confused with E. juvenalis and E. lucilius. The species is listed as threatened in Connecticut and Maine. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 3 | Shenandoah National Park | 🇺🇸 United States | |
| 4 | Merritt Island National Wildlife Refuge | 🇺🇸 United States | |
| 5 | Joshua Tree National Park | 🇺🇸 United States | |
| 6 | Zion National Park | 🇺🇸 United States | |
| 7 | Big Bend National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Sleepy Duskywing sighting in Great Smoky Mountains National Park on a given day, based on 57 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 106th most-seen of the 822 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.
March and April
In those months about 30% of wildlife watchers report a Sleepy Duskywing in Great Smoky Mountains National Park on a given day, against under 5% in June to February, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Sleepy Duskywing sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 7
Of the 7 parks where we can rate Sleepy Duskywing sightings, Great Smoky Mountains National Park ranks 2nd at about 10%. The best odds are in Guadalupe Mountains National Park (United States, about 20%).
Same genus: Erynnis
The closest relatives of the Sleepy Duskywing that you can see in Great Smoky Mountains National Park (genus Erynnis, Duskywings) are Juvenal's Duskywing (about 20%), Dreamy Duskywing (about 10%) and Horace's Duskywing (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sleepy Duskywing is recorded against all the insects logged in Great Smoky Mountains National Park (57 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.
