Berberomeloe castuo
In 3 days ~40% in a week ~70%
Berberomeloe castuo, known commonly as the Portuguese red-striped oil beetle, is a species of beetle in the genus of Berberomeloe. Berberomeloe, a genus within the tribe Lyttini of the family Meloidae (also known as oil or blister beetles), comprises the species Berberomeloe castuo formerly identified as Berberomeloe majalis. These beetles are wingless and parasitize solitary bees during their larval stage and are pollinators as adults. Their most distinctive feature is their bulky abdomens. Individuals from populations found in the southwestern region of the Iberian Peninsula (which includes southern Portugal and southwestern Spain) exhibit a uniform black coloration. In contrast, specimens from populations situated north of the Sistema Central mountain range, encompassing northern Portugal and the Spanish provinces of Ourense, León, and Zamora, typically display wider abdominal transverse bars than those in the southern and central populations. Specimens of this species can exhibit distinctive abdominal transverse bars. In the majority of populations within the Extremadura region, these bars appear yellow to orange. However, in areas extending northward to the Sistema... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Monfragüe National Park | 🇪🇸 Spain |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Portuguese Red-Striped Oil Beetle sighting in Monfragüe National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 41st most-seen of the 84 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
April to June
In those months about 20% of wildlife watchers report a Portuguese Red-Striped Oil Beetle in Monfragüe National Park on a given day, against under 5% in July to March, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Portuguese Red-Striped Oil Beetle sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Monfragüe National Park, in our data
Monfragüe National Park is the only park on Wallace's Line with enough records to rate Portuguese Red-Striped Oil Beetle sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Portuguese Red-Striped Oil Beetle is recorded against all the insects logged in Monfragüe National Park (10 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.
