Silhouette: Mattia Menchetti · PhyloPic
Strymon sylvinus
In 3 days ~10% in a week ~30%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Glacier National Park | 🇺🇸 United States | |
| 2 | Olympic National Park | 🇺🇸 United States | |
| 3 | Yellowstone National Park | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Strymon sylvinus sighting in Olympic National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 135th most-seen of the 207 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.
August
In that month about 10% of wildlife watchers report a Strymon sylvinus in Olympic National Park on a given day, against under 5% in September to July, the lowest months. That is one of Olympic National Park's driest months, with about 45 mm of rain against 370 mm in November.
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.
2nd of 3
Of the 3 parks where we can rate Strymon sylvinus sightings, Olympic National Park ranks 2nd at under 5%. The best odds are in Glacier National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Strymon sylvinus is recorded against all the insects logged in Olympic National Park (10 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.
