Ennomos autumnaria
In 3 days ~10% in a week ~20%
Ennomos autumnaria, the large thorn, is a moth of the family Geometridae. The species can be found in Western and Central Europe East to Russia and Siberia The wingspan is 40–50 mm. The length of the forewings is 21–28 mm. The ground colour is brown, red-brown or yellow-brown to yellowish beige. The forewing edge is scalloped and the forewing is marked with yellow and dark brown lines. The thorax is yellow to light brown. The antennae of the male are pectinate. The caterpillar is light yellowish-brown to reddish. It is up to 50 mm long. On segment five there few humps and on segment nine two long protrusions. It resembles a dead twig.
Similar species: other Ennomos. Biotopes: Forest edges, parks, gardens with trees. The moths fly in one generation from September to October.[1] They are attracted to light. The caterpillars feed on a number of deciduous trees.(Quercus sp., Alnus sp., Prunus sp., Salix sp., Tilia sp., Malus sp., Populus sp., Acer sp., Betula sp., Ulmus sp.). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wadden Sea National Park | 🇩🇪 Germany |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Novosibirsk | 🇷🇺 Russia | |
| 2 | Kyiv | 🇺🇦 Ukraine | |
| 3 | Nizhny Novgorod | 🇷🇺 Russia | |
| 4 | Moscow | 🇷🇺 Russia | |
| 5 | Prague | 🇨🇿 Czechia | |
| 6 | Saint Petersburg | 🇷🇺 Russia | |
| 7 | Vienna | 🇦🇹 Austria |
Rare
Under 5% of wildlife watchers report a Large Thorn sighting in Wadden Sea National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 630th most-seen of the 818 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.
August and September
In those months about 10% of wildlife watchers report a Large Thorn in Wadden Sea National Park on a given day, against under 5% in October to July, the lowest months.
Between 5 and 8 am
Across all the parks we cover, that three-hour window holds the most Large Thorn sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Wadden Sea National Park, in our data
Wadden Sea National Park is the only park on Wallace's Line with enough records to rate Large Thorn sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Large Thorn is recorded against all the insects logged in Wadden Sea National Park (7 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.
