Boloria eunomia
In 3 days ~20% in a week ~30%
Boloria eunomia, the bog fritillary or ocellate bog fritillary, is a butterfly of the family Nymphalidae. The length of the forewings is 20–24 mm. The wings are orange brown with dark markings. The color of the hindwings are orangish brown with a tan postmedian band followed by a row of round silver spots. Seitz- A. aphirape Hbn. (= eunomia Esp., tomyris Hbst.) (67f). Above pale reddish yellow, with a narrow black margin and small black submarginal lunules; the basal area separated from the central area by a black dentate line and bearing heavy markings. The median area with but one very regular row of dots in the middle, at the proximal side of which there are often feeble shadows in the female. Hindwing proximally dull ochreous, with yellowish macular bands near the base and in the middle. The distal area of the hindwing beneath light yellow, with a row of small white-centred ocelli and thin hastate markings before the margin.
The butterfly may be threatened by bog hydrology. The males search for females in wet areas. The butterfly has the subspecies triclaris (from Newfoundland to Alberta), nichollae (Alberta), and denali (Alaska and northern Yukon). The butterfly... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jasper National Park | 🇨🇦 Canada | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 3 | Pyrénées National Park | 🇫🇷 France | |
| 4 | Banff National Park | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Bog Fritillary sighting in Pyrénées National Park on a given day, based on 21 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 506th most-seen of the 1277 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
June and July
In those months about 10% of wildlife watchers report a Bog Fritillary in Pyrénées National Park on a given day, against under 5% in August to May, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Bog 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 4 parks where we can rate Bog Fritillary sightings, Pyrénées National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Jasper National Park (Canada, about 10%) and Bavarian Forest National Park (Germany, about 10%).
Same genus: Boloria
The closest relatives of the Bog Fritillary that you can see in Pyrénées National Park (genus Boloria, Lesser Fritillaries) are Weaver's Fritillary (about 20%), Eurasian Silver-Bordered Fritillary (about 10%) and Shepherd's Fritillary (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Bog Fritillary is recorded against all the insects logged in Pyrénées National Park (21 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.
