Eudonia lacustrata
In 3 days ~10% in a week ~30%
Eudonia lacustrata is a species of moth of the family Crambidae described by Georg Wolfgang Franz Panzer in 1804. It is found in Europe, north-west Africa, Asia from Turkey, Iran and Syria to Siberia and the western part of China (Hunan). The subspecies E. lacustrata persica is found in Iran and Armenia.
The wingspan is 16–18 mm (0.63–0.71 in). Forewings whitish, sometimes mixed with light ochreous-yellowish, sprinkled with black; base black-marked; lines whitish, blackish-edged, first irregular, second rather sinuate; orbicular and claviform dot-like, black; a black X-shaped discal mark; terminal area grey mixed with black, subterminal line white, interrupted in middle. Hindwings whitish-grey, darker terminally.
Larva yellowish-green; spots brownish-green; head and plate of 2 black-brown: on mosses; 3, 4. The moth flies from May to August depending on the location. The larvae feed on various mosses. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mercantour National Park | 🇫🇷 France | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 3 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 4 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 5 | Cévennes National Park | 🇫🇷 France | |
| 6 | Pyrénées National Park | 🇫🇷 France | |
| 7 | Wadden Sea National Park | 🇩🇪 Germany | |
| 8 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Manchester | 🇬🇧 United Kingdom | |
| 3 | London | 🇬🇧 United Kingdom | |
| 4 | Birmingham | 🇬🇧 United Kingdom | |
| 5 | Helsinki | 🇫🇮 Finland | |
| 6 | Leeds | 🇬🇧 United Kingdom | |
| 7 | Budapest | 🇭🇺 Hungary | |
| 8 | Essen | 🇩🇪 Germany | |
| 9 | Brussels | 🇧🇪 Belgium | |
| 10 | Munich | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Little Grey sighting in Sierra de Guadarrama National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 416th most-seen of the 597 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
June and July
In those months about 10% of wildlife watchers report a Little Grey in Sierra de Guadarrama National Park on a given day, against under 5% in August to May, the lowest months. Those are among Sierra de Guadarrama National Park's driest months, with about 45 mm of rain a month against 110 mm in November.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Little Grey sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
8th of 8
Of the 8 parks where we can rate Little Grey sightings, Sierra de Guadarrama National Park ranks 8th at under 5%. The best odds are in Mercantour National Park (France, about 10%), Bavarian Forest National Park (Germany, about 10%) and Snowdonia National Park (United Kingdom, about 10%).
Same genus: Eudonia
The closest relatives of the Little Grey that you can see in Sierra de Guadarrama National Park (genus Eudonia) are Narrow-Winged Grey (about 10%) and Pied Grey (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Little Grey is recorded against all the insects logged in Sierra de Guadarrama National Park (8 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.
