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 |
Rare
Under 5% of wildlife watchers report a Common Roadside-Skipper sighting in Rocky Mountain National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 146th most-seen of the 191 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.
May to July
In those months about 10% of wildlife watchers report a Common Roadside-Skipper in Rocky Mountain National Park on a given day, against under 5% in August to April, 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.
3rd of 3
Of the 3 parks where we can rate Common Roadside-Skipper sightings, Rocky Mountain National Park ranks 3rd at under 5%. The best odds are in Isle Royale National Park (United States, about 10%) and Glacier National Park (United States, about 10%).
Same family: Hesperiidae
The closest relatives of the Common Roadside-Skipper that you can see in Rocky Mountain National Park (family Hesperiidae, Skippers) are Russet Skipperling (about 10%), Persius Duskywing (about 10%) and Common Branded 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 Rocky Mountain National Park (8 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.
