Boloria thore
In 3 days ~30% in a week ~60%
Boloria thore, the Thor's fritillary, is a butterfly of the family Nymphalidae. It occurs in damp places in the Alps, Fennoscandia, the south of European Russia, the Urals and east across the Palearctic to Siberia and Japan.
The wingspan is 28–34 mm. Seitz - A. thore Hbn. (68e). The nymotypical form of this species is easily recognized by the prevalence of black on the upperside. This colour predominates to such a degree as in other species is only the case in melanistic aberrations. Also the ground-colour of the underside is duller than in all the other Argynnis, the hindwing varying from dark brick-red to cinnamon-brown, only the median band being dark yellow. In the Alps, but at moderates heights in the forest region, not above 6000 ft. Also in the high North, Scandinavia and Finland. Northern specimens on the whole paler than alpine ones. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hohe Tauern National Park | 🇦🇹 Austria |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Thor's Fritillary sighting in Hohe Tauern National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 93rd most-seen of the 165 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Thor's Fritillary in Hohe Tauern National Park on a given day, against under 5% in February–May and August–October, the lowest months. December has too few records to rate.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Thor's Fritillary sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Hohe Tauern National Park, in our data
Hohe Tauern National Park is the only park on Wallace's Line with enough records to rate Thor's Fritillary sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Boloria
The closest relatives of the Thor's Fritillary that you can see in Hohe Tauern National Park (genus Boloria, Lesser Fritillaries) are Mountain Fritillary (about 20%), Shepherd's Fritillary (about 20%) and Eurasian Silver-Bordered Fritillary (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Thor's Fritillary is recorded against all the insects logged in Hohe Tauern National Park (7 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.
