Hemileuca hera
In 3 days ~20% in a week ~40%
Hemileuca hera, the sagebrush sheep moth or Hera buckmoth, is a moth of the family Saturniidae. The species was first described by Thaddeus William Harris in 1841. It is found in North America from southern Saskatchewan west to British Columbia, south to Arizona and New Mexico.
The wingspan is 71–93 mm. Adults are on wing from July to September depending on the location. The larvae of Hemileuca hera hera feed on Artemisia tridentata, A. tripartita, Lupinus and Eriogonum. The larvae of Hemileuca hera marcata feed on A. tridentata. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Grand Teton National Park | 🇺🇸 United States | |
| 2 | Yellowstone National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Sagebrush Sheep Moth sighting in Yellowstone National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 69th most-seen of the 160 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.
July and August
In those months about 10% of wildlife watchers report a Sagebrush Sheep Moth in Yellowstone National Park on a given day, against under 5% in September to June, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Sagebrush Sheep Moth sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Sagebrush Sheep Moth sightings, Yellowstone National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Grand Teton National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Sagebrush Sheep Moth is recorded against all the insects logged in Yellowstone National Park (14 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.
