What are the chances of seeing an Idaea ostrinaria in Cévennes National Park?
With luck
About 10% of wildlife watchers report an Idaea ostrinaria sighting in Cévennes National Park on a given day, based on 95 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 174th most-seen of the 996 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
When is the best time to see an Idaea ostrinaria in Cévennes National Park?
June and July
In those months about 20% of wildlife watchers report an Idaea ostrinaria in Cévennes National Park on a given day, against under 5% in August to April, the lowest months. Those are among Cévennes National Park's driest months, with about 60 mm of rain a month against 260 mm in October.
What time of day is best to see an Idaea ostrinaria?
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Idaea ostrinaria sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Is Cévennes National Park the best place to see an Idaea ostrinaria?
Yes
Of the 3 parks where we can rate Idaea ostrinaria sightings, Cévennes National Park has the highest daily chance: about 10%. Next come Sierra Nevada National Park (Spain, about 10%) and Sierra de Guadarrama National Park (Spain, about 10%).
Which relatives of the Idaea ostrinaria live in Cévennes National Park?
Same genus: Idaea
The closest relatives of the Idaea ostrinaria that you can see in Cévennes National Park (genus Idaea) are Portland Ribbon Wave (about 10%), Satin Wave (about 10%) and Least Carpet (about 10%), with each one's daily chance of a sighting.
Where does the Idaea ostrinaria sighting chance come from?
GBIF citizen-science records
It is estimated from how often the Idaea ostrinaria is recorded against all the insects logged in Cévennes National Park (95 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.