Hemihyalea edwardsii
In 3 days ~20% in a week ~40%
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 Sequoia and Kings Canyon National Parks on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 84th most-seen of the 161 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
October
In that month about 30% of wildlife watchers report an Edwards' Glassy-Wing in Sequoia and Kings Canyon National Parks on a given day, against under 5% in July–August and November–May, the lowest months. That is one of Sequoia and Kings Canyon National Parks's driest months, with about 20 mm of rain against 190 mm in January.
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.
Among the best
Of the 2 parks where we can rate Edwards' Glassy-Wing sightings, Sequoia and Kings Canyon National Parks ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Zion National Park (United States, about 10%).
Same family: Erebidae
The closest relatives of the Edwards' Glassy-Wing that you can see in Sequoia and Kings Canyon National Parks (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Douglas-Fir Tussock Moth (about 20%), Wandering Tiger Moth (about 10%) and Painted Tiger 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 Sequoia and Kings Canyon National Parks (8 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.
