Drymonia ruficornis
In 3 days ~20% in a week ~40%
Drymonia ruficornis, the lunar marbled brown, is a moth of the family Notodontidae. It is found in Central and Southern Europe and Anatolia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 3 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 4 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom | |
| 2 | Birmingham | 🇬🇧 United Kingdom | |
| 3 | Prague | 🇨🇿 Czechia | |
| 4 | Paris | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Lunar Marbled Brown sighting in Snowdonia National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 336th most-seen of the 387 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
April
In that month about 20% of wildlife watchers report a Lunar Marbled Brown in Snowdonia National Park on a given day, against under 5% in May to February, the lowest months. That is one of Snowdonia National Park's driest months, with about 95 mm of rain against 240 mm in December.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Lunar Marbled Brown sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Yes
Of the 4 parks where we can rate Lunar Marbled Brown sightings, Snowdonia National Park has the highest daily chance: about 10%. Next come Bavarian Forest National Park (Germany, about 10%) and Sierra de Guadarrama National Park (Spain, about 10%).
GBIF citizen-science records
It is estimated from how often the Lunar Marbled Brown is recorded against all the insects logged in Snowdonia National Park (5 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.
