Libelloides longicornis
In 3 days ~30% in a week ~50%
Libelloides longicornis, common name black yellow owlfly, is an owlfly species belonging to the family Ascalaphidae, subfamily Ascalaphinae. This species is present in South Western Europe (France, Germany, Italy, Portugal, Spain and Switzerland). These insects mainly occur in the sunny meadows at rather high elevation.
Libelloides longicornis can reach a length of 25–30 mm (0.98–1.18 in) and a wingspan of 38–58 mm (1.5–2.3 in). The body of these large owlflies is black, quite hairy, with some yellow markings. Also the head is black, with large compound eyes. The long sturdy black antennae are clubbed.
The wings do not have scales, are partly transparent and show a network of translucent lemon yellow ribs. In the fore wings appears a small basal dark spot reaching the base of the wings. The hind wings have a characteristic squared dark area towards the apex and a dark triangular sickle-shaped spot pointing to the wing tip.
The wings are usually held spread in sunny areas, as in dragonflies, but when they are at rest they fold their roof-shaped wings over their abdomen. This species is rather similar to Libelloides coccajus, but in Libelloides... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 2 | Mercantour National Park | 🇫🇷 France | |
| 3 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 4 | Cévennes National Park | 🇫🇷 France | |
| 5 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Libelloides longicornis sighting in Sierra Nevada National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 240th most-seen of the 479 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
June
In that month about 30% of wildlife watchers report a Libelloides longicornis in Sierra Nevada National Park on a given day, against under 5% in August to May, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Libelloides longicornis sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 5 parks where we can rate Libelloides longicornis sightings, Sierra Nevada National Park has the highest daily chance: about 10%. Next come Mercantour National Park (France, about 10%) and Sierra de Guadarrama National Park (Spain, about 10%).
Same genus: Libelloides
The closest relatives of the Libelloides longicornis that you can see in Sierra Nevada National Park (genus Libelloides) are Libelloides baeticus (about 20%) and Libelloides ictericus (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Libelloides longicornis is recorded against all the insects logged in Sierra Nevada National Park (8 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.
