Claassenia sabulosa
Silhouette: Prespa Research Group · PhyloPic
In 3 days ~20% in a week ~30%
Claassenia sabulosa, the short-wing stone, is a species of common stonefly in the family Perlidae. It is found in North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Glacier National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Calgary | 🇨🇦 Canada |
No species of the same family or order lives in Glacier National Park, so these are its closest relatives here: other insects.
With luck
About 10% of wildlife watchers report a Shortwing Stonefly sighting in Glacier National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 119th 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 30%, if each day is a fresh chance.
July to September
In those months about 10% of wildlife watchers report a Shortwing Stonefly in Glacier National Park on a given day, against under 5% in October to June, the lowest months. Those are among Glacier National Park's driest months, with about 35 mm of rain a month against 80 mm in February.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Shortwing Stonefly sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Glacier National Park, in our data
Glacier National Park is the only park on Wallace's Line with enough records to rate Shortwing Stonefly sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Shortwing Stonefly is recorded against all the insects logged in Glacier 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.
