Speyeria atlantis
In 3 days ~40% in a week ~70%
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 |
Possible
About 20% of wildlife watchers report an Atlantis Fritillary sighting in Elk Island National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 40th most-seen of the 112 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
June and July
In those months about 30% of wildlife watchers report an Atlantis Fritillary in Elk Island National Park on a given day, against under 5% in August to May, the lowest months. Those are among Elk Island National Park's wettest months, with about 110 mm of rain a month against 20 mm in December.
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.
Among the best
Of the 9 parks where we can rate Atlantis Fritillary sightings, Elk Island National Park ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Cape Breton Highlands National Park (Canada, about 20%).
GBIF citizen-science records
It is estimated from how often the Atlantis Fritillary is recorded against all the insects logged in Elk Island National Park (15 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.
