Stenopterus ater
In 3 days ~20% in a week ~30%
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 Sierra de Guadarrama National Park on a given day, based on 19 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 207th most-seen of the 597 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
June and July
In those months about 10% of wildlife watchers report a Stenopterus ater in Sierra de Guadarrama National Park on a given day, against under 5% in August to May, the lowest months. Those are among Sierra de Guadarrama National Park's driest months, with about 45 mm of rain a month 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.
2nd of 2
Of the 2 parks where we can rate Stenopterus ater sightings, Sierra de Guadarrama National Park ranks 2nd at about 10%. The best odds are in Sierra Nevada National Park (Spain, about 20%).
GBIF citizen-science records
It is estimated from how often the Stenopterus ater is recorded against all the insects logged in Sierra de Guadarrama National Park (19 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.
