Idaea emarginata
In 3 days ~20% in a week ~40%
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 |
With luck
About 10% of wildlife watchers report a Small Scallop sighting in Wadden Sea National Park on a given day, based on 61 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 142nd most-seen of the 818 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Small Scallop in Wadden Sea National Park on a given day, against under 5% in September to June, the lowest months.
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.
Only Wadden Sea National Park, in our data
Wadden Sea National Park is the only park on Wallace's Line with enough records to rate Small Scallop sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Idaea
The closest relatives of the Small Scallop that you can see in Wadden Sea National Park (genus Idaea) are Riband Wave (about 10%), Single-Dotted Wave (about 10%) and Small Fan-Footed Wave (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Small Scallop is recorded against all the insects logged in Wadden Sea National Park (61 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.
