Erebia epipsodea
In 3 days ~40% in a week ~70%
Erebia epipsodea, the common alpine, is a butterfly species of the subfamily Satyrinae of family Nymphalidae. It is found in North America from Alaska south through the Rocky Mountains to northern New Mexico and east across the prairie provinces to southwest Manitoba.
The wingspan is 34–45 mm (1.3–1.8 in). Adults are on wing from mid-June to early August. The larvae feed on various grass species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Elk Island National Park | 🇨🇦 Canada | |
| 2 | Yellowstone National Park | 🇺🇸 United States | |
| 3 | Jasper National Park | 🇨🇦 Canada | |
| 4 | Banff National Park | 🇨🇦 Canada | |
| 5 | Riding Mountain National Park | 🇨🇦 Canada | |
| 6 | Grand Teton National Park | 🇺🇸 United States | |
| 7 | Glacier National Park | 🇺🇸 United States | |
| 8 | Rocky Mountain National Park | 🇺🇸 United States |
Possible
About 20% of wildlife watchers report a Common Alpine sighting in Elk Island National Park on a given day, based on 12 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
In that month about 40% of wildlife watchers report a Common Alpine in Elk Island National Park on a given day, against under 5% in July to April, the lowest months. That is one of Elk Island National Park's wettest months, with about 110 mm of rain against 20 mm in December.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Common Alpine sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 8 parks where we can rate Common Alpine sightings, Elk Island National Park has the highest daily chance: about 20%. Next come Yellowstone National Park (United States, about 10%) and Jasper National Park (Canada, about 10%).
GBIF citizen-science records
It is estimated from how often the Common Alpine is recorded against all the insects logged in Elk Island 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.
