Aricia artaxerxes
In 3 days ~30% in a week ~60%
The northern brown argus (Aricia artaxerxes) is a butterfly in the family Lycaenidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vanoise National Park | 🇫🇷 France | |
| 2 | Mercantour National Park | 🇫🇷 France | |
| 3 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 4 | Triglav National Park | 🇸🇮 Slovenia | |
| 5 | Ecrins National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Moscow | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Northern Brown Argus sighting in Triglav National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 133rd most-seen of the 260 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 and August
In those months about 20% of wildlife watchers report a Northern Brown Argus in Triglav National Park on a given day, against under 5% in September to May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Northern Brown Argus sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 5
Of the 5 parks where we can rate Northern Brown Argus sightings, Triglav National Park ranks 4th at about 10%. The best odds are in Vanoise National Park (France, about 20%), Mercantour National Park (France, about 20%) and Cairngorms National Park (United Kingdom, about 10%).
Same family: Lycaenidae
The closest relatives of the Northern Brown Argus that you can see in Triglav National Park (family Lycaenidae, Gossamer-winged Butterflies) are Chalkhill Blue (about 40%), Chequered Blue (about 20%) and Sooty Copper (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Northern Brown Argus is recorded against all the insects logged in Triglav National Park (12 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.
