Odontopera bidentata
In 3 days ~40% in a week ~70%
The scalloped hazel (Odontopera bidentata) is a moth of the family Geometridae. The species was first described by Carl Alexander Clerck in 1759. It is a common species of northern and central Europe including the British Isles and Russia to the Urals. It is also widespread through Siberia and the Amur-Ussuri region to the Kuril Islands and Japan.
The wingspan is 46–50 mm. The forewing ground colour is usually grey brown. The same coloured midfield is bordered by blackish crossbars that are often partly white. At the wing edge below the apex are two characteristic, protruding teeth. The scientific name of the species is derived from the Latin language bi = "twice" and dentatus = "toothed". The outer dark crossline of the forewings continues on the hindwings. All wings have a ring-shaped dark discal spots. The thorax is hairy. This is a very variable species with the wing colour ranging from whitish through buff and brown to black, sometimes with variegation, but it is always easily identifiable by the white discal spot on each wing and the characteristic "ragged" margin of the wings. Last instar caterpillars have a brownish colouration. However,... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 3 | Mercantour National Park | 🇫🇷 France | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Birmingham | 🇬🇧 United Kingdom | |
| 3 | London | 🇬🇧 United Kingdom |
Possible
About 20% of wildlife watchers report a Scalloped Hazel sighting in Snowdonia National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 84th most-seen of the 387 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
May
In that month about 30% of wildlife watchers report a Scalloped Hazel in Snowdonia National Park on a given day, against under 5% in July–August and October–March, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Scalloped Hazel sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 4 parks where we can rate Scalloped Hazel sightings, Snowdonia National Park has the highest daily chance: about 20%. Next come Cairngorms National Park (United Kingdom, about 10%) and Mercantour National Park (France, about 10%).
Same family: Geometridae
The closest relatives of the Scalloped Hazel that you can see in Snowdonia National Park (family Geometridae, Geometer Moths) are Brimstone Moth (about 30%), Small Phoenix (about 20%) and Peppered Moth (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Scalloped Hazel is recorded against all the insects logged in Snowdonia National Park (23 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.
