Hemihyalea edwardsii
In 3 days ~30% in a week ~50%
Pseudohemihyalea edwardsii, or Edwards' glassy-wing, is a moth in the family Erebidae. It was described by Alpheus Spring Packard in 1864. It is found in the United States from western Oregon and the Columbia Gorge in southern Washington south to California, in the south-west east to western New Mexico. The habitat consists of oak woodlands and mixed hardwood forests at low elevations.
The length of the forewings is 27–31 mm. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Zion National Park | 🇺🇸 United States | |
| 2 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Francisco | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report an Edwards' Glassy-Wing sighting in Zion National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 45th most-seen of the 114 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.
October
In that month about 40% of wildlife watchers report an Edwards' Glassy-Wing in Zion National Park on a given day, against under 5% in November to August, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Edwards' Glassy-Wing sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Yes
Of the 2 parks where we can rate Edwards' Glassy-Wing sightings, Zion National Park has the highest daily chance: about 10%. Next come Sequoia and Kings Canyon National Parks (United States, about 10%).
Same family: Erebidae
The closest relatives of the Edwards' Glassy-Wing that you can see in Zion National Park (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Litocala Moth (about 10%), Box-Elder Tussock Moth (about 10%) and Angel Lichen Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Edwards' Glassy-Wing is recorded against all the insects logged in Zion 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.
