Clossiana euphrosyne
In 3 days ~60% in a week ~90%
The pearl-bordered fritillary (Boloria euphrosyne) is a butterfly of the family Nymphalidae found in Europe and through Russia across the Palearctic to the north of Kazakhstan. The adult butterfly is orange with black spots on the upperside of its wing and has a wingspan of 38–46 mm. The underside of the wings have a row of silver-pearly markings along the edge, which give the species its name. The pearl-bordered fritillary is often confused with the small pearl-bordered fritillary, but can be distinguished by the triangle along its pearl border (the small pearl-bordered has black chevrons) as well as the presence of a single silver spot in the middle of a row of yellow spots. The female has darker markings and rounder wings than the male. The caterpillars are black with white or yellow spines along their backs.
Like other species of fritillary, the males have special scent glands on their wings so that they can be recognised by females of their own species and therefore find a suitable partner. A. euphrosyne L. (= niobe Mull.) (67h). Very similar to the preceding species, especially selene, but brighter red and the black markings thinner... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 2 | Mercantour National Park | 🇫🇷 France | |
| 3 | Vanoise National Park | 🇫🇷 France | |
| 4 | Aigüestortes National Park | 🇪🇸 Spain | |
| 5 | Triglav National Park | 🇸🇮 Slovenia | |
| 6 | Ecrins National Park | 🇫🇷 France | |
| 7 | Pyrénées National Park | 🇫🇷 France | |
| 8 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 9 | Cévennes National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Munich | 🇩🇪 Germany |
Possible
About 30% of wildlife watchers report a Pearl-Bordered Fritillary sighting in Mercantour National Park on a given day, based on 55 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 52nd most-seen of the 412 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
June
In that month about 50% of wildlife watchers report a Pearl-Bordered Fritillary in Mercantour National Park on a given day, against under 5% in January–April and September–November, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Pearl-Bordered Fritillary sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 9 parks where we can rate Pearl-Bordered Fritillary sightings, Mercantour National Park ranks 2nd at about 30%, level with the leaders once rounded. The best odds are in Hohe Tauern National Park (Austria, about 30%).
Same family: Nymphalidae
The closest relatives of the Pearl-Bordered Fritillary that you can see in Mercantour National Park (family Nymphalidae, Brush-footed Butterflies) are Almond Ringlet (about 40%), Large Ringlet (about 40%) and Niobe Fritillary (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pearl-Bordered Fritillary is recorded against all the insects logged in Mercantour National Park (55 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.
