Aplocera praeformata
In 3 days ~40% in a week ~70%
Aplocera praeformata, known as the purple treble-bar, is a species of moth in the family Geometridae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mercantour National Park | 🇫🇷 France | |
| 2 | Vanoise National Park | 🇫🇷 France | |
| 3 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 4 | Ecrins National Park | 🇫🇷 France | |
| 5 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Purple Treble-Bar sighting in Vanoise National Park on a given day, based on 33 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 132nd most-seen of the 308 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
July
In that month about 30% of wildlife watchers report a Purple Treble-Bar in Vanoise National Park on a given day, against under 5% in September to June, the lowest months.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Purple Treble-Bar sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Among the best
Of the 5 parks where we can rate Purple Treble-Bar sightings, Vanoise National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Mercantour National Park (France, about 10%).
Same family: Geometridae
The closest relatives of the Purple Treble-Bar that you can see in Vanoise National Park (family Geometridae, Geometer Moths) are Common Heath (about 20%), Psodos quadrifaria (about 20%) and Latticed Heath (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Purple Treble-Bar is recorded against all the insects logged in Vanoise National Park (33 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.
