Boloria selene
In 3 days ~20% in a week ~40%
Boloria selene, known in Europe as the small pearl-bordered fritillary, is a species of butterfly of the family Nymphalidae. It is found across Europe, Asia and North America, and feeds exclusively on violets in its larval stages. This species prefers wet grassland habitats, where its larval food source, violets, are found. It overwinters in its larval stage, and eggs hatch in the late summer to early autumn. Members of this species are prey for multiple types of birds and other insects.
Due to modern agriculture, most of the grassland habitats that sustain Boloria selene are fragmented or lost all together in favor of farmland. Because of this, the small pearl-bordered fritillary has seen a serious drop in population across Europe, in some places as much as 80%. Factors including limited habitat range, low dispersal rate, and strong food specialization also contribute to population loss. Despite modern conservation efforts, the number of small pearl-bordered fritillaries is still declining. The North American populations appear to be affected in the same way, at least in the continental United States.
The small pearl-bordered fritillary is similar to the pearl-bordered... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 2 | Picos de Europa National Park | 🇪🇸 Spain | |
| 3 | Aigüestortes National Park | 🇪🇸 Spain | |
| 4 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 5 | Pyrénées National Park | 🇫🇷 France | |
| 6 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 7 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 8 | Cévennes National Park | 🇫🇷 France | |
| 9 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Moscow | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Eurasian Silver-Bordered Fritillary sighting in Cévennes National Park on a given day, based on 24 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 345th most-seen of the 996 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 to September
In those months about 10% of wildlife watchers report a Eurasian Silver-Bordered Fritillary in Cévennes National Park on a given day, against under 5% in October to May, the lowest months. Those are among Cévennes National Park's driest months, with about 65 mm of rain a month against 260 mm in October.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Eurasian Silver-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.
8th of 9
Of the 9 parks where we can rate Eurasian Silver-Bordered Fritillary sightings, Cévennes National Park ranks 8th at about 10%. The best odds are in Cairngorms National Park (United Kingdom, about 20%), Picos de Europa National Park (Spain, about 20%) and Aigüestortes National Park (Spain, about 20%).
Same genus: Boloria
The closest relatives of the Eurasian Silver-Bordered Fritillary that you can see in Cévennes National Park (genus Boloria, Lesser Fritillaries) are Weaver's Fritillary (about 10%) and Titania's Fritillary (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Eurasian Silver-Bordered Fritillary is recorded against all the insects logged in Cévennes National Park (24 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.
