Mastor vialis
In 3 days ~10% in a week ~30%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Isle Royale National Park | 🇺🇸 United States | |
| 2 | Glacier National Park | 🇺🇸 United States | |
| 3 | Rocky Mountain National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Common Roadside-Skipper sighting in Glacier National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 134th most-seen of the 147 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
June and July
In those months about 10% of wildlife watchers report a Common Roadside-Skipper in Glacier National Park on a given day, against under 5% in August to May, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Common Roadside-Skipper 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 3 parks where we can rate Common Roadside-Skipper sightings, Glacier National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Isle Royale National Park (United States, about 10%).
Same family: Hesperiidae
The closest relatives of the Common Roadside-Skipper that you can see in Glacier National Park (family Hesperiidae, Skippers) are Essex Skipper (about 10%), Western Arctic Skipper (about 10%) and Woodland Skipper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Roadside-Skipper is recorded against all the insects logged in Glacier National Park (6 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.
