Idaea dimidiata
In 3 days ~30% in a week ~60%
Idaea dimidiata, the single-dotted wave, is a moth of the family Geometridae. It is a Holarctic species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wadden Sea National Park | 🇩🇪 Germany | |
| 2 | Gros Morne National Park | 🇨🇦 Canada | |
| 3 | Acadia National Park | 🇺🇸 United States | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 5 | Pyrénées National Park | 🇫🇷 France | |
| 6 | Olympic National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 2 | Liverpool | 🇬🇧 United Kingdom | |
| 3 | London | 🇬🇧 United Kingdom | |
| 4 | Birmingham | 🇬🇧 United Kingdom | |
| 5 | Porto | 🇵🇹 Portugal | |
| 6 | Boston | 🇺🇸 United States | |
| 7 | Leeds | 🇬🇧 United Kingdom | |
| 8 | Dublin | 🇮🇪 Ireland | |
| 9 | Toronto | 🇨🇦 Canada | |
| 10 | Montreal | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Single-Dotted Wave sighting in Wadden Sea National Park on a given day, based on 87 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 45th most-seen of the 818 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.
July
In that month about 30% of wildlife watchers report a Single-Dotted Wave in Wadden Sea National Park on a given day, against under 5% in September to May, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Single-Dotted Wave sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Yes
Of the 6 parks where we can rate Single-Dotted Wave sightings, Wadden Sea National Park has the highest daily chance: about 10%. Next come Gros Morne National Park (Canada, about 10%) and Acadia National Park (United States, about 10%).
Same genus: Idaea
The closest relatives of the Single-Dotted Wave that you can see in Wadden Sea National Park (genus Idaea) are Riband Wave (about 10%), Small Scallop (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 Single-Dotted Wave is recorded against all the insects logged in Wadden Sea National Park (87 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.
