Nola confusalis
In 3 days ~10% in a week ~20%
Nola confusalis, the least black arches, is a moth of the family Nolidae. It is found in most of Europe, east to eastern Asia and Japan. The wingspan is 16–18 mm. Adults are on wing from mid April to mid June in one generation in western Europe.
The larvae mainly feed on various deciduous trees and bushes, including lime (Tilia species) and evergreen oak (Quercus ilex). Larvae can be found from June to August. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 3 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 4 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Birmingham | 🇬🇧 United Kingdom | |
| 2 | Liverpool | 🇬🇧 United Kingdom | |
| 3 | London | 🇬🇧 United Kingdom | |
| 4 | Paris | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a Least Black Arches sighting in Pyrénées National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 1026th most-seen of the 1277 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 and May
In those months about 10% of wildlife watchers report a Least Black Arches in Pyrénées National Park on a given day, against under 5% in June to March, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Least Black Arches sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
4th of 4
Of the 4 parks where we can rate Least Black Arches sightings, Pyrénées National Park ranks 4th at under 5%. The best odds are in Snowdonia National Park (United Kingdom, about 10%), Cairngorms National Park (United Kingdom, about 10%) and Bavarian Forest National Park (Germany, about 10%).
GBIF citizen-science records
It is estimated from how often the Least Black Arches is recorded against all the insects logged in Pyrénées 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.
