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 Grand Canyon National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 124th most-seen of the 143 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 to July
In those months about 10% of wildlife watchers report a Glover's Silkmoth in Grand Canyon National Park on a given day, against under 5% in August to April, the lowest months. Those are among Grand Canyon National Park's driest months, with about 10 mm of rain a month against 40 mm in March.
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, Grand Canyon National Park ranks 5th 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 Grand Canyon National Park (order Lepidoptera, Butterflies and Moths) are White-Lined Sphinx (about 30%), Painted Lady (about 30%) and Silver-Spotted Tiger Moth (about 20%), 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 Grand Canyon National Park (5 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.
