Strymon acaciae
In 3 days ~20% in a week ~30%
| # | 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 Sierra de Guadarrama National Park on a given day, based on 18 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 258th most-seen of the 597 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 Sloe Hairstreak in Sierra de Guadarrama National Park on a given day, against under 5% in August to May, the lowest months. Those are among Sierra de Guadarrama National Park's driest months, with about 45 mm of rain a month against 110 mm in November.
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, Sierra de Guadarrama National Park ranks 5th at about 10%, level with the leaders once rounded. The best odds are in Vanoise National Park (France, about 10%), Ecrins National Park (France, about 10%) and Aigüestortes National Park (Spain, about 10%).
Same family: Lycaenidae
The closest relatives of the Sloe Hairstreak that you can see in Sierra de Guadarrama National Park (family Lycaenidae, Gossamer-winged Butterflies) are Small Copper (about 30%), Southern Brown Argus (about 20%) and Iberian Sooty Copper (about 20%), 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 Sierra de Guadarrama National Park (18 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.
