Cyaniris semiargus
In 3 days ~20% in a week ~40%
Cyaniris semiargus, the Mazarine blue, is a Palearctic butterfly in the family Lycaenidae. There was a large native population in Britain in the early part of the 19th century, but it disappeared before the 20th century, though single vagrants have been spotted, and some estimates of British resident extinction... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 2 | Mercantour National Park | 🇫🇷 France | |
| 3 | Vanoise National Park | 🇫🇷 France | |
| 4 | Aigüestortes National Park | 🇪🇸 Spain | |
| 5 | Triglav National Park | 🇸🇮 Slovenia | |
| 6 | Ecrins National Park | 🇫🇷 France | |
| 7 | Pyrénées National Park | 🇫🇷 France | |
| 8 | Cévennes National Park | 🇫🇷 France | |
| 9 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Novosibirsk | 🇷🇺 Russia | |
| 2 | Helsinki | 🇫🇮 Finland | |
| 3 | Moscow | 🇷🇺 Russia | |
| 4 | Munich | 🇩🇪 Germany | |
| 5 | Saint Petersburg | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Mazarine Blue sighting in Cévennes National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 493rd most-seen of the 996 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
May to July
In those months about 10% of wildlife watchers report a Mazarine Blue in Cévennes National Park on a given day, against under 5% in August to April, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Mazarine Blue sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
8th of 9
Of the 9 parks where we can rate Mazarine Blue sightings, Cévennes National Park ranks 8th at about 10%. The best odds are in Hohe Tauern National Park (Austria, about 30%), Mercantour National Park (France, about 30%) and Vanoise National Park (France, about 20%).
Same family: Lycaenidae
The closest relatives of the Mazarine Blue that you can see in Cévennes National Park (family Lycaenidae, Gossamer-winged Butterflies) are Sooty Copper (about 40%), Common Blue (about 30%) and Small Copper (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Mazarine Blue is recorded against all the insects logged in Cévennes National Park (15 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.
