Cerambyx welensii
In 3 days ~20% in a week ~40%
Cerambyx welensii is a species of beetle in the family Cerambycidae (longhorn beetles). This species demonstrates sexual dimorphism, characterized by physical and behavioral differences between males and females, due to their varying body and antenna sizes.
Cerambyx welensii can reach a length of 25–58 millimetres (0.98–2.28 in). These beetles have an elongated body. Antennae of males extend beyond the apex of the elytra by last three antennal segments. The basic color is brownish, with clearer apex of the elytra. Elytra are entirely covered by a thick, white to yellowish setae and have rounded apex. The pronotum shows a thorny tubercle on its sides. This species is rather similar to Cerambyx carinatus... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Cerambyx welensii sighting in Cévennes National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 555th 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 40%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Cerambyx welensii in Cévennes National Park on a given day, against under 5% in September to June, 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 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Cerambyx welensii sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Cévennes National Park, in our data
Cévennes National Park is the only park on Wallace's Line with enough records to rate Cerambyx welensii sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Cerambyx
The closest relatives of the Cerambyx welensii that you can see in Cévennes National Park (genus Cerambyx) are Great Capricorn Beetle (about 20%) and Capricorn Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cerambyx welensii is recorded against all the insects logged in Cévennes National Park (11 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.
