Idaea emarginata
In 3 days ~10% in a week ~20%
Idaea emarginata, the small scallop, is a moth of the family Geometridae. It was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae and it is found in Europe. The species has a wingspan of 22–25 mm. The length of the forewings is 11–13 mm. The adults fly at night from June to August [1], and can be attracted to light.
The species prefers damp locations such as marshy woodland, meadows and marshes. ^The flight season refers to the British Isles. This may vary in other parts of the range. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wadden Sea National Park | 🇩🇪 Germany |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Saint Petersburg | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report a Small Scallop sighting in Saint Petersburg on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 377th 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 Small Scallop 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 5 and 8 am
Across all the parks we cover, that three-hour window holds the most Small Scallop sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
2nd of 2
Of the 2 cities where we can rate Small Scallop 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 Small Scallop is recorded against all the insects logged in Saint Petersburg (5 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.
