Philopotamus montanus
In 3 days ~30% in a week ~50%
Philopotamus montanus, common name yellow spotted sedge, is a species of caddisfly belonging to the family Philopotamidae. It extends over whole Europe eastwards to Northwestern and Northern Russia. The aquatic stages of Philopotamus montanus can be found mainly in small rivers in uplands, in brooks and rivulets and in stony streams, often with rapids, as this species prefers high current velocities.
Philopotamus montanus can reach a body length of about 4–9 mm (0.16–0.35 in), with a wingspan of about 12–20 mm (0.47–0.79 in). These medium sized caddisflies are usually light brown... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Yellow Spotted Sedge sighting in Snowdonia National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 168th most-seen of the 387 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
March and April
In those months about 20% of wildlife watchers report a Yellow Spotted Sedge in Snowdonia National Park on a given day, against under 5% in August and October–February, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Yellow Spotted Sedge sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Snowdonia National Park, in our data
Snowdonia National Park is the only park on Wallace's Line with enough records to rate Yellow Spotted Sedge sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Yellow Spotted Sedge is recorded against all the insects logged in Snowdonia National Park (12 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.
