Silhouette: Mattia Menchetti · PhyloPic
Strymon sylvinus
In 3 days ~20% in a week ~50%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Glacier National Park | 🇺🇸 United States | |
| 2 | Olympic National Park | 🇺🇸 United States | |
| 3 | Yellowstone National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Strymon sylvinus sighting in Glacier National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 60th 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 50%, if each day is a fresh chance.
July and August
In those months about 10% of wildlife watchers report a Strymon sylvinus in Glacier National Park on a given day, against under 5% in September to June, the lowest months. Those are among Glacier National Park's driest months, with about 30 mm of rain a month against 80 mm in February.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Strymon sylvinus 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 3 parks where we can rate Strymon sylvinus sightings, Glacier National Park has the highest daily chance: about 10%. Next come Olympic National Park (United States, under 5%) and Yellowstone National Park (United States, under 5%).
Same family: Lycaenidae
The closest relatives of the Strymon sylvinus that you can see in Glacier National Park (family Lycaenidae, Gossamer-winged Butterflies) are Mariposa Copper (about 20%), Blue Copper (about 20%) and Arctic Blue (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Strymon sylvinus is recorded against all the insects logged in Glacier 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.
