Erynnis brizo
In 3 days ~40% in a week ~70%
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 |
Possible
About 20% of wildlife watchers report a Sleepy Duskywing sighting in Guadalupe Mountains National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 28th most-seen of the 57 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
March
In that month about 40% of wildlife watchers report a Sleepy Duskywing in Guadalupe Mountains National Park on a given day, against under 5% in May 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.
Yes
Of the 7 parks where we can rate Sleepy Duskywing sightings, Guadalupe Mountains National Park has the highest daily chance: about 20%. Next come Great Smoky Mountains National Park (United States, about 10%) and Shenandoah National Park (United States, about 10%).
Same order: Lepidoptera
The closest relatives of the Sleepy Duskywing that you can see in Guadalupe Mountains National Park (order Lepidoptera, Butterflies and Moths) are Variegated Fritillary (about 30%), White-Lined Sphinx (about 20%) and Marine Blue (about 20%), 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 Guadalupe Mountains 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.
