Eumedonia eumedon
In 3 days ~60% in a week ~90%
Eumedonia eumedon, the geranium argus, is a butterfly of the family Lycaenidae. It is found in the Palearctic realm. This butterfly has been included in the genera Plebejus, Plebeius, Polyommatus and Aricia, but recent molecular studies have demonstrated that Eumedonia is a valid genus, different from the previous genera mentioned.
The wingspan is 26–30 mm. The butterfly flies from May to August depending on the location. The larvae feed on Geraniaceae species (genera Geranium and Erodium). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vanoise National Park | 🇫🇷 France | |
| 2 | Mercantour National Park | 🇫🇷 France | |
| 3 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 4 | Ecrins National Park | 🇫🇷 France | |
| 5 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Moscow | 🇷🇺 Russia |
Possible
About 20% of wildlife watchers report a Geranium Argus sighting in Mercantour National Park on a given day, based on 35 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 71st most-seen of the 412 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
June
In that month about 40% of wildlife watchers report a Geranium Argus in Mercantour National Park on a given day, against under 5% in August to May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Geranium Argus 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 5 parks where we can rate Geranium Argus sightings, Mercantour National Park ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Vanoise National Park (France, about 20%).
Same family: Lycaenidae
The closest relatives of the Geranium Argus that you can see in Mercantour National Park (family Lycaenidae, Gossamer-winged Butterflies) are Scarce Copper (about 50%), Sooty Copper (about 40%) and Chalkhill Blue (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Geranium Argus is recorded against all the insects logged in Mercantour National Park (35 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.
