Cteniopus sulphureus
In 3 days ~20% in a week ~50%
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 Cévennes National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 283rd most-seen of the 996 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Sulphur Beetle in Cévennes National Park on a given day, against under 5% in August to May, the lowest months. That is one of Cévennes National Park's driest months, with about 35 mm of rain against 260 mm in October.
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.
3rd of 6
Of the 6 parks where we can rate Sulphur Beetle sightings, Cévennes National Park ranks 3rd at about 10%. The best odds are in Aigüestortes National Park (Spain, about 20%) and Triglav National Park (Slovenia, about 10%).
Same family: Tenebrionidae
The closest relatives of the Sulphur Beetle that you can see in Cévennes National Park (family Tenebrionidae, Darkling Beetles) are Allecula morio (about 10%), Diaperis boleti (about 10%) and Omophlus lepturoides (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sulphur Beetle is recorded against all the insects logged in Cévennes National Park (23 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.
