Idaea degeneraria
In 3 days ~20% in a week ~30%
Idaea degeneraria, the Portland ribbon wave, is a moth of the family Geometridae. The species was first described by Jacob Hübner in 1799. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 3 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 4 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Portland Ribbon Wave sighting in Prague on a given day, based on 25 verified sightings from GBIF citizen-science data. It is the 236th most-seen of the 724 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.
May and August–October
In those months about 10% of wildlife watchers report a Portland Ribbon Wave in Prague on a given day, against under 5% in June–July and November–April, the lowest months.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Portland Ribbon Wave 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.
Among the best
Of the 14 cities where we can rate Portland Ribbon Wave sightings, Prague ranks 12th at about 10%, level with the leaders once rounded. The best odds are in Budapest (Hungary, about 10%), Porto (Portugal, about 10%) and Sofia (Bulgaria, about 10%).
Same genus: Idaea
The closest relatives of the Portland Ribbon Wave that you can see in Prague (genus Idaea) are Small Dusty Wave (about 10%), Riband Wave (about 10%) and Least Carpet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Portland Ribbon Wave is recorded against all the insects logged in Prague (25 verified sightings), 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.
