Brachycentrus subnubilis
In 3 days ~10% in a week ~20%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vienna | 🇦🇹 Austria |
Rare
Under 5% of wildlife watchers report a Grannom Caddisfly sighting in Vienna on a given day, based on 20 verified sightings from GBIF citizen-science data. It is the 599th most-seen of the 1406 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
April
In that month about 10% of wildlife watchers report a Grannom Caddisfly in Vienna on a given day, against under 5% in May to March, the lowest months.
Between 5 and 8 pm
Across all the parks we cover, that three-hour window holds the most Grannom Caddisfly sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Only Vienna, in our data
Vienna is the only city on Wallace's Line with enough records to rate Grannom Caddisfly sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Grannom Caddisfly is recorded against all the insects logged in Vienna (20 verified sightings), 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.
