Scopula immorata
In 3 days ~30% in a week ~60%
Scopula immorata, the Lewes wave, is a moth of the family Geometridae. It is found throughout Europe and the Near East. The wingspan is 20–27 millimetres (0.79–1.06 in). The moth flies in two generations from the end of June to mid August in western Europe.
The larva feeds on various low-growing plants like thyme and oregano. Mating occurs from the males seeking out females in simple courtship behavior, taking place at ~6-10am for an hour to an hour and a half. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Biebrza National Park | 🇵🇱 Poland | |
| 2 | Vanoise National Park | 🇫🇷 France | |
| 3 | Mercantour National Park | 🇫🇷 France | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 5 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nizhny Novgorod | 🇷🇺 Russia | |
| 2 | Berlin | 🇩🇪 Germany | |
| 3 | Prague | 🇨🇿 Czechia | |
| 4 | Helsinki | 🇫🇮 Finland | |
| 5 | Vienna | 🇦🇹 Austria | |
| 6 | Moscow | 🇷🇺 Russia | |
| 7 | Saint Petersburg | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Lewes Wave sighting in Mercantour National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 199th most-seen of the 412 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.
June and July
In those months about 20% of wildlife watchers report a Lewes Wave in Mercantour National Park on a given day, against under 5% in September to May, the lowest months.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Lewes Wave sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
3rd of 5
Of the 5 parks where we can rate Lewes Wave sightings, Mercantour National Park ranks 3rd at about 10%. The best odds are in Biebrza National Park (Poland, about 20%) and Vanoise National Park (France, about 20%).
GBIF citizen-science records
It is estimated from how often the Lewes Wave is recorded against all the insects logged in Mercantour National Park (12 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.
