Strymon acaciae
In 3 days ~30% in a week ~50%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vanoise National Park | 🇫🇷 France | |
| 2 | Ecrins National Park | 🇫🇷 France | |
| 3 | Aigüestortes National Park | 🇪🇸 Spain | |
| 4 | Cévennes National Park | 🇫🇷 France | |
| 5 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 6 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Prague | 🇨🇿 Czechia |
With luck
About 10% of wildlife watchers report a Sloe Hairstreak sighting in Ecrins National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 119th most-seen of the 251 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Sloe Hairstreak in Ecrins National Park on a given day, against under 5% in August to May, the lowest months. That is one of Ecrins National Park's driest months, with about 50 mm of rain against 160 mm in December.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Sloe Hairstreak 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 6 parks where we can rate Sloe Hairstreak sightings, Ecrins National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Vanoise National Park (France, about 10%).
Same family: Lycaenidae
The closest relatives of the Sloe Hairstreak that you can see in Ecrins National Park (family Lycaenidae, Gossamer-winged Butterflies) are Scarce Copper (about 30%), Chalkhill Blue (about 30%) and Damon Blue (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sloe Hairstreak is recorded against all the insects logged in Ecrins 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.
