Boloria graeca
In 3 days ~40% in a week ~70%
The Balkan fritillary (Boloria graeca) is a butterfly in the family Nymphalidae found in the southern Alps of Europe and the mid- to high-altitude Balkans. It inhabits grassy, flower-rich areas, often near the tree line. The larva feeds on Viola species.
The orange upperside of the wings has a brown basal suffusion adorned with various marks of brown color, submarginal round spots and lines forming festoons. The hindwing forms an angle at its anterior edge. The underside of the forewings is identical, that of the hindwings presents silver designs, a line of small circles and greenish marbling in the female. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mercantour National Park | 🇫🇷 France |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Balkan Fritillary sighting in Mercantour National Park on a given day, based on 22 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 129th most-seen of the 412 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.
August
In that month about 30% of wildlife watchers report a Balkan Fritillary in Mercantour National Park on a given day, against under 5% in September to June, the lowest months. That is one of Mercantour National Park's driest months, with about 50 mm of rain against 140 mm in October.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Balkan Fritillary sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Mercantour National Park, in our data
Mercantour National Park is the only park on Wallace's Line with enough records to rate Balkan Fritillary sightings: about 20% of wildlife watchers there report one on a given day.
Same genus: Boloria
The closest relatives of the Balkan Fritillary that you can see in Mercantour National Park (genus Boloria, Lesser Fritillaries) are Titania's Fritillary (about 30%), Shepherd's Fritillary (about 10%) and Mountain Fritillary (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Balkan Fritillary is recorded against all the insects logged in Mercantour National Park (22 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.
