Esperia sulphurella
In 3 days ~20% in a week ~40%
Esperia sulphurella, also known as the sulphur tubic, is a species of gelechioid moth in the family Oecophoridae. It is native to Europe, but has been introduced in California. Adults have a body length of 6–8 millimetres (0.24–0.31 in), and its wingspan is 12–16 millimetres (0.47–0.63 in). The wingspan is between 12 and 16 millimeters. They have a dark brown ground colour. The forewing has a pale yellow marking. The predominantly pale yellow hind wings are dark brown at the tips. At about two-thirds of the length of the antennae, the antennae have a white band.
They are on wing in spring. The larvae are black and feed on dead wood. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom | |
| 2 | Birmingham | 🇬🇧 United Kingdom | |
| 3 | Rome | 🇮🇹 Italy | |
| 4 | Istanbul | 🇹🇷 Turkey | |
| 5 | Brussels | 🇧🇪 Belgium | |
| 6 | Paris | 🇫🇷 France | |
| 7 | Liverpool | 🇬🇧 United Kingdom | |
| 8 | Lyon | 🇫🇷 France | |
| 9 | Sacramento | 🇺🇸 United States | |
| 10 | Essen | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Sulphur Tubic sighting in Snowdonia National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 294th 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.
May
In that month about 20% of wildlife watchers report a Sulphur Tubic in Snowdonia National Park on a given day, against under 5% in June to March, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Sulphur Tubic sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Sulphur Tubic sightings, Snowdonia National Park has the highest daily chance: about 10%. Next come Wadden Sea National Park (Germany, under 5%).
GBIF citizen-science records
It is estimated from how often the Sulphur Tubic is recorded against all the insects logged in Snowdonia National Park (6 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.
