Archiearis parthenias
In 3 days ~10% in a week ~20%
Archiearis parthenias, the orange underwing, is a moth of the family Geometridae. The species was first described by Carl Linnaeus in 1761 and can be found in Europe, Russia and Japan. The wingspan is about 30–40 mm. The moths fly from February to May depending on the location.
The larvae feed first on the catkins and then on the leaves of birch (Betula species). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Białowieża National Park | 🇵🇱 Poland |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Novosibirsk | 🇷🇺 Russia | |
| 2 | Helsinki | 🇫🇮 Finland | |
| 3 | Moscow | 🇷🇺 Russia | |
| 4 | Yekaterinburg | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report an Orange Underwing sighting in Yekaterinburg on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 112th most-seen of the 155 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 an Orange Underwing in Yekaterinburg on a given day, against under 5% in May to March, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Orange Underwing sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 4
Of the 4 cities where we can rate Orange Underwing sightings, Yekaterinburg ranks 4th at under 5%. The best odds are in Novosibirsk (Russia, about 10%), Helsinki (Finland, under 5%) and Moscow (Russia, under 5%).
GBIF citizen-science records
It is estimated from how often the Orange Underwing is recorded against all the insects logged in Yekaterinburg (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.
