Athous haemorrhoidalis
In 3 days ~10% in a week ~20%
Athous haemorrhoidalis is a species of European and Asian click beetles in the genus Athous. Several variations are recognized. The adult is a fairly slender beetle, 10–15 mm long, with straight antennae which are long enough to reach the back of the pronotum (which covers the thorax). The head and thorax are black, the elytra brown and strongly ribbed. The pronotum is clearly dimpled all over. The whole body is covered with greyish-brown hairs. The legs are a paler brown than the elytra. Like other click beetles, the joint between thorax and abdomen forms a flexible hinge, and there is a central knob at the back of the thorax. The species is sexually dimorphic; males are smaller than females, and the side of the male's pronotum is less wavy than the female's.
This click beetle is found throughout the British Isles. It is widespread across Europe and Asia. It is predominantly a lowland species, being entirely absent above 600 m elevation, and becoming steadily scarcer from sea level up to 500 m.
If disturbed the adult can flick itself high (up to 245 mm) into the air, with a takeoff speed of up to 2.27 m/s, making a loud clicking noise... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 2 | Kyiv | 🇺🇦 Ukraine | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | Manchester | 🇬🇧 United Kingdom | |
| 5 | Leeds | 🇬🇧 United Kingdom | |
| 6 | Amsterdam | 🇳🇱 Netherlands | |
| 7 | Minsk | 🇧🇾 Belarus | |
| 8 | Cologne | 🇩🇪 Germany | |
| 9 | Liverpool | 🇬🇧 United Kingdom | |
| 10 | Hamburg | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Common Brown Click Beetle sighting in Boston on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 1063rd most-seen of the 1200 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Common Brown Click Beetle in Boston on a given day, so our monthly data shows no clear season.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Common Brown Click 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.
20th of 20
Of the 20 cities where we can rate Common Brown Click Beetle sightings, Boston ranks 20th at under 5%. The best odds are in Rotterdam [The Hague] (Netherlands, about 10%), Kyiv (Ukraine, about 10%) and Birmingham (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Common Brown Click Beetle is recorded against all the insects logged in Boston (6 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.
