Euthrix potatoria
In 3 days ~80% in a week >90%
Euthrix potatoria, the drinker, is an orange-brown moth of the family Lasiocampidae. The species' common and scientific names derive from the larva's supposed drinking of drops of dew. The scientific name Euthryx potatoria was given to this moth by Carl Linnaeus in 1758. In choosing the name potatoria 'drinker-like', he was inspired by the Dutch entomologist Johannes Goedaert, who had called the animal dronckaerdt 'drunkard' "because it is very much inclined to drinking". This remark refers to the moth's habit of repeatedly plunging its head into the water. The English name drinker (moth) also refers to Goedaert's analogy.
The imago has a wingspan of 4.5–6.5 cm (1.8–2.6 in). The yellowish females are slightly larger than... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Biebrza National Park | 🇵🇱 Poland | |
| 3 | Białowieża National Park | 🇵🇱 Poland | |
| 4 | Wadden Sea National Park | 🇩🇪 Germany | |
| 5 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom | |
| 2 | Liverpool | 🇬🇧 United Kingdom | |
| 3 | Copenhagen | 🇩🇰 Denmark | |
| 4 | Birmingham | 🇬🇧 United Kingdom | |
| 5 | Nizhny Novgorod | 🇷🇺 Russia | |
| 6 | Paris | 🇫🇷 France | |
| 7 | Moscow | 🇷🇺 Russia | |
| 8 | Vienna | 🇦🇹 Austria | |
| 9 | Saint Petersburg | 🇷🇺 Russia |
Likely
About 50% of wildlife watchers report a Drinker Moth sighting in Snowdonia National Park on a given day, based on 178 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the most-seen of the 387 insects we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
May and June
In those months about 60% of wildlife watchers report a Drinker Moth in Snowdonia National Park on a given day, against under 5% in February and December, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Drinker Moth sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 5 parks where we can rate Drinker Moth sightings, Snowdonia National Park has the highest daily chance: about 50%. Next come Biebrza National Park (Poland, about 40%) and Białowieża National Park (Poland, about 30%). All parks ranked.
Same family: Lasiocampidae
The closest relatives of the Drinker Moth that you can see in Snowdonia National Park (family Lasiocampidae, Lappet Moths) are Oak Eggar (about 30%), Fox Moth (about 30%) and The Lackey (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Drinker Moth is recorded against all the insects logged in Snowdonia National Park (178 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.
