Speyeria atlantis
In 3 days ~20% in a week ~40%
Speyeria atlantis, the Atlantis fritillary, is a butterfly of the family Nymphalidae of North America. It is found from the Avalon Peninsula of Newfoundland and Labrador to northern British Columbia, across the northern United States south as far as Colorado and West Virginia. It resides as far north as James Bay. The species is listed as endangered in Connecticut.
Its upperside is dark orange with many rows of black markings and black wing margins. Its underside is a light brown with many silvery-white spots. Wingspan ranges from 50–64 millimetres (2.0–2.5 in). The larvae are hosted by violets. Adult foods include common milkweed, mint, mountain laurel, crown vetch, burdock, boneset, ox-eye daisy, spiraea, and virgin's bower.
Atlantis fritillaries are sensitive to temperature with population trajectories showing declines in response to climate warming trends. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cape Breton Highlands National Park | 🇨🇦 Canada | |
| 2 | Elk Island National Park | 🇨🇦 Canada | |
| 3 | Banff National Park | 🇨🇦 Canada | |
| 4 | Gros Morne National Park | 🇨🇦 Canada | |
| 5 | Jasper National Park | 🇨🇦 Canada | |
| 6 | Acadia National Park | 🇺🇸 United States | |
| 7 | Grand Canyon National Park | 🇺🇸 United States | |
| 8 | Glacier National Park | 🇺🇸 United States | |
| 9 | Rocky Mountain National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report an Atlantis Fritillary sighting in Glacier National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 86th most-seen of the 147 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
In that month about 10% of wildlife watchers report an Atlantis Fritillary in Glacier National Park on a given day, against under 5% in August to June, the lowest months. That is one of Glacier National Park's driest months, with about 20 mm of rain against 80 mm in February.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Atlantis Fritillary sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
8th of 9
Of the 9 parks where we can rate Atlantis Fritillary sightings, Glacier National Park ranks 8th at about 10%. The best odds are in Cape Breton Highlands National Park (Canada, about 20%), Elk Island National Park (Canada, about 20%) and Banff National Park (Canada, about 10%).
Same genus: Speyeria
The closest relatives of the Atlantis Fritillary that you can see in Glacier National Park (genus Speyeria) are Mormon Fritillary (about 10%), Hydaspe Fritillary (about 10%) and Zerene Fritillary (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Atlantis Fritillary is recorded against all the insects logged in Glacier National Park (12 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.
