Cteniopus sulphureus
In 3 days ~20% in a week ~30%
Cteniopus sulphureus, the sulphur beetle, is a species of comb-clawed beetles belonging to the family Tenebrionidae subfamily Alleculinae. These beetles are mainly present in Denmark, Finland, Slovenia, Italy and Sweden.
The adults grow up to 7–8 millimetres (0.28–0.31 in) long. Elytra are pale yellow, while head and pronotum are orange-yellow. The shape of the head is extended forward. These thermophilic beetles can mainly be encountered in sunny places on inflorescences of Apiaceae and Asteraceae species, especially Achillea species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Aigüestortes National Park | 🇪🇸 Spain | |
| 2 | Triglav National Park | 🇸🇮 Slovenia | |
| 3 | Cévennes National Park | 🇫🇷 France | |
| 4 | Pyrénées National Park | 🇫🇷 France | |
| 5 | Wadden Sea National Park | 🇩🇪 Germany | |
| 6 | Bavarian Forest National Park | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Sulphur Beetle sighting in Wadden Sea National Park on a given day, based on 18 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 312th most-seen of the 818 insects we can rate there. Over three days the chance rises to about 20%, 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 Sulphur Beetle in Wadden Sea National Park on a given day, against under 5% in August to May, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Sulphur Beetle sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
5th of 6
Of the 6 parks where we can rate Sulphur Beetle sightings, Wadden Sea National Park ranks 5th at about 10%. The best odds are in Aigüestortes National Park (Spain, about 20%), Triglav National Park (Slovenia, about 10%) and Cévennes National Park (France, about 10%).
GBIF citizen-science records
It is estimated from how often the Sulphur Beetle is recorded against all the insects logged in Wadden Sea National Park (18 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.
