Speyeria mormonia
In 3 days ~30% in a week ~60%
Speyeria mormonia, commonly known as the Mormon fritillary, is a North American butterfly belonging to the family Nymphalidae. It is highly diverse, having differentiated into several subspecies which occupy a wide geographic range. S. mormonia exhibits extreme protandry, which is the emergence of male adults before female adults. This has several consequences on male and female behavior. Habitat specificity is still being investigated, as there are few known environmental predictors, and S. mormonia appears to be associated with a wide range of habitats. This species is not under threat, and conservation efforts are generally not necessary.
S. mormonia is found throughout western North America, with significant populations in both the United States and Canada. Four subspecies are present in Canada, from the Yukon region through British Columbia. Several more subspecies are present in the United States, with montane populations in the Colorado Rocky Mountains, and mesic populations in California and Nevada. S. mormonia is a wide-ranging species compared to other Speyeria, and exhibits high genetic variability as a result.
S. mormonia occupy a... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wrangell-St. Elias National Park | 🇺🇸 United States | |
| 2 | Yosemite National Park | 🇺🇸 United States | |
| 3 | Grand Teton National Park | 🇺🇸 United States | |
| 4 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 5 | Glacier National Park | 🇺🇸 United States | |
| 6 | Jasper National Park | 🇨🇦 Canada | |
| 7 | Yellowstone National Park | 🇺🇸 United States | |
| 8 | Banff National Park | 🇨🇦 Canada | |
| 9 | Rocky Mountain National Park | 🇺🇸 United States | |
| 10 | Great Bear Rainforest | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Mormon Fritillary sighting in Yellowstone National Park on a given day, based on 48 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 20th most-seen of the 160 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
July and August
In those months about 20% of wildlife watchers report a Mormon Fritillary in Yellowstone National Park on a given day, against under 5% in October to June, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Mormon Fritillary sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
7th of 10
Of the 10 parks where we can rate Mormon Fritillary sightings, Yellowstone National Park ranks 7th at about 10%. The best odds are in Wrangell-St. Elias National Park (United States, about 30%), Yosemite National Park (United States, about 20%) and Grand Teton National Park (United States, about 20%).
GBIF citizen-science records
It is estimated from how often the Mormon Fritillary is recorded against all the insects logged in Yellowstone National Park (48 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.
