Ennomos quercinaria
In 3 days ~10% in a week ~20%
Ennomos quercinaria, the August thorn, is a moth of the family Geometridae. The species can be found in Europe. It was first described by Johann Siegfried Hufnagel in 1767. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an August Thorn sighting in Vienna on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 1178th 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an August Thorn in Vienna on a given day, so our monthly data shows no clear season.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most August Thorn 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.
6th of 7
Of the 7 cities where we can rate August Thorn sightings, Vienna ranks 6th at under 5%. The best odds are in Kharkiv (Ukraine, about 10%), London (United Kingdom, about 10%) and Munich (Germany, under 5%).
GBIF citizen-science records
It is estimated from how often the August Thorn is recorded against all the insects logged in Vienna (6 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.
