Stenopterus ater
In 3 days ~20% in a week ~40%
Stenopterus ater is a species of longhorn beetle found across the Western Mediterranean region from North Africa to France and Italy. The larvae grow in dead wood and the adults visit Umbelliferae flowers in summer. They are about 6 to 14 mm long with males and females being differently coloured. The elytra are all black in females and yellowish brown in males. A case of gynandromorphism has been recorded in the species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 2 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
With luck
About 10% of wildlife watchers report a Stenopterus ater sighting in Rome on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 131st most-seen of the 289 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.
June
In that month about 20% of wildlife watchers report a Stenopterus ater in Rome on a given day, against under 5% in August to May, the lowest months. That is one of Rome's driest months, with about 35 mm of rain against 110 mm in November.
Between 6 and 9 pm
Across all the parks we cover, that three-hour window holds the most Stenopterus ater sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 3 cities where we can rate Stenopterus ater sightings, Rome ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Algiers (Algeria, about 10%).
Same family: Cerambycidae
The closest relatives of the Stenopterus ater that you can see in Rome (family Cerambycidae, Longhorn Beetles) are Herophila tristis (about 10%), Cerambyx welensii (about 10%) and Heart Longhorn Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Stenopterus ater is recorded against all the insects logged in Rome (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.
