Sinodendron cylindricum
In 3 days ~10% in a week ~30%
Sinodendron cylindricum, the rhinoceros stag beetle, horned stag beetle, or simply the rhinoceros beetle, is a species of stag beetle native to Europe. It is characterised by a clear sexual dimorphism. The beetles reach a body length of 12 to 16 millimeters and have a very shiny, black body, sometimes with turquoise sheen. Despite being in the family Lucanidae (stag beetles), they look rather like true rhinoceros beetles, which are well known for their rhinoceros-like horn. The body is cylindrical and the elytra and thorax have distinct rows of pits and grooves. The males have a well-developed horn on their heads, which is significantly smaller in the females. In addition, the cavities on the pronotum in the female are much shallower than the distinct cavities in the male. The larvae are white and soft with brown heads.
With the exception of southwestern Spain and Portugal and northern Scandinavia, the species occurs throughout the European continent and the British Isles to western Siberia. The beetle prefers primary deciduous forests at cooler and higher altitudes, but can also be found in old willow stands, avenue and street trees... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Białowieża National Park | 🇵🇱 Poland | |
| 2 | Cairngorms National Park | 🇬🇧 United Kingdom |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Leeds | 🇬🇧 United Kingdom | |
| 2 | Nizhny Novgorod | 🇷🇺 Russia | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | Stockholm | 🇸🇪 Sweden | |
| 5 | Copenhagen | 🇩🇰 Denmark | |
| 6 | Hamburg | 🇩🇪 Germany | |
| 7 | Helsinki | 🇫🇮 Finland | |
| 8 | Moscow | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report a Horned Stag Beetle sighting in Copenhagen on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 260th most-seen of the 476 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
February and June
In those months about 10% of wildlife watchers report a Horned Stag Beetle in Copenhagen on a given day, against under 5% in March–May and July–January, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Horned Stag Beetle sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
5th of 8
Of the 8 cities where we can rate Horned Stag Beetle sightings, Copenhagen ranks 5th at under 5%. The best odds are in Leeds (United Kingdom, about 10%), Nizhny Novgorod (Russia, about 10%) and Birmingham (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Horned Stag Beetle is recorded against all the insects logged in Copenhagen (10 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.
