Hyalophora gloveri
In 3 days ~20% in a week ~30%
Hyalophora gloveri, or Glover's silkmoth, is a moth of the family Saturniidae. The species was first described by Ferdinand Heinrich Hermann Strecker in 1872. It is found in the Rocky Mountain states, the western parts of the northern Great Plains, and the Canadian prairie provinces, north-west to at least central Alberta. It is also found in northern Mexico.
It is considered a subspecies of Hyalophora columbia by several authorities. The wingspan is about 100 mm. The larvae feed on Shepherdia argentea, Elaeagnus angustifolia, Salix species, etc. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Grand Teton National Park | 🇺🇸 United States | |
| 2 | Elk Island National Park | 🇨🇦 Canada | |
| 3 | Zion National Park | 🇺🇸 United States | |
| 4 | Rocky Mountain National Park | 🇺🇸 United States | |
| 5 | Grand Canyon National Park | 🇺🇸 United States | |
| 6 | Yellowstone National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Glover's Silkmoth sighting in Rocky Mountain National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 110th most-seen of the 191 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
May and June
In those months about 10% of wildlife watchers report a Glover's Silkmoth in Rocky Mountain National Park on a given day, against under 5% in July to April, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Glover's Silkmoth sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 6 parks where we can rate Glover's Silkmoth sightings, Rocky Mountain National Park ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Grand Teton National Park (United States, about 10%), Elk Island National Park (Canada, about 10%) and Zion National Park (United States, about 10%).
Same order: Lepidoptera
The closest relatives of the Glover's Silkmoth that you can see in Rocky Mountain National Park (order Lepidoptera, Butterflies and Moths) are Rocky Mountain Parnassian (about 30%), Spotted Tussock Moth (about 30%) and Police Car Moth (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Glover's Silkmoth is recorded against all the insects logged in Rocky Mountain 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.
