Scopula immutata
In 3 days ~10% in a week ~20%
Scopula immutata, the lesser cream wave, is a moth of the family Geometridae. It was described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. It is found throughout Europe. A typical temperate to boreal Palearctic species. In Europe it ranges from the west coast of France and the British Isles to the Urals. In the north it extends from central Scandinavia, south to central Italy and south Bulgaria. This latter occurrence is isolated from the main populations and is limited to higher regions. There are also isolated, very much small occurrences in northern Portugal and north-eastern Spain, as well as evidence in Corsica and Sardinia. However, these findings must still be confirmed. Outside Europe the species spreads east across the Caucasus, Kazakhstan, southern Siberia, Mongolia and the Russian Far East and Sakhalin.
The species is moisture loving and is therefore found in humid forests, swamps, bogs, wet meadows and along rivers. In the Alps and southern Europe it rises up to 1,200 metres (3,900 ft), rarely even higher (max. 1,850 meters).
The wingspan is 24–27 millimetres (0.94–1.06 in). The length of the forewings is 12–13 millimetres... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 2 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Saint Petersburg | 🇷🇺 Russia | |
| 3 | Vienna | 🇦🇹 Austria | |
| 4 | Moscow | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report a Lesser Cream Wave sighting in Saint Petersburg on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 332nd most-seen of the 448 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
July
In that month about 10% of wildlife watchers report a Lesser Cream Wave in Saint Petersburg on a given day, against under 5% in August to June, the lowest months. That is one of Saint Petersburg's wettest months, with about 100 mm of rain against 40 mm in February.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Lesser Cream 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.
2nd of 4
Of the 4 cities where we can rate Lesser Cream Wave sightings, Saint Petersburg ranks 2nd at under 5%. The best odds are in Helsinki (Finland, about 10%).
GBIF citizen-science records
It is estimated from how often the Lesser Cream Wave is recorded against all the insects logged in Saint Petersburg (6 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.
