Cerambyx cerdo
In 3 days ~10% in a week ~20%
Cerambyx cerdo, commonly known as the great capricorn beetle or cerambyx longicorn, is a species of beetle in family Cerambycidae. It occurs in North Africa (Algeria, Morocco, and Tunisia), Europe (Austria, Belarus, Bulgaria, Croatia, the Czech Republic, North Macedonia, France, Georgia, Germany, Hungary, Italy, Moldova, Poland, Portugal, Romania, Russia, Serbia, Slovakia, Spain, Sweden, Switzerland, and Ukraine), and West Asia (Armenia, Azerbaijan, Georgia, Iran, and Turkey).
The beetle was previously present in the United Kingdom but went locally extinct at least hundreds of years ago. Preserved specimens have been found in the UK, having been dated to around 4000 years old. It has been recorded in the UK since, but this is believed to be because of accidental human introduction due to wood transport.
This beetle measures between 41 and 55 mm in body length and is among the largest of the European beetle species. It has an elongated, robust body and, like all members of the longhorn family, it has long antennae. In males, these thread-like antennae are longer than the body, but in females they are only as long as the hard wing cases (the elytra). The legs and body... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Pyrénées National Park | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a Great Capricorn Beetle sighting in Vienna on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 838th most-seen of the 1406 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
June
In that month about 10% of wildlife watchers report a Great Capricorn Beetle in Vienna on a given day, against under 5% in July to May, the lowest months. That is one of Vienna's wettest months, with about 90 mm of rain against 40 mm in February.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Great Capricorn Beetle sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
Among the best
Of the 4 cities where we can rate Great Capricorn Beetle sightings, Vienna ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Warsaw (Poland, under 5%), Paris (France, under 5%) and Porto (Portugal, under 5%).
GBIF citizen-science records
It is estimated from how often the Great Capricorn Beetle is recorded against all the insects logged in Vienna (12 verified sightings), 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.
