Diarsia mendica
In 3 days ~20% in a week ~40%
The ingrailed clay (Diarsia mendica) is a moth of the family Noctuidae. The species was first described by Johan Christian Fabricius in 1775. It is distributed through most of Europe and the Palearctic. This species occurs in a huge range of colours and is one of the most variable species in the family. Its forewings range in colour from very pale straw to very dark brown, with the pale forms predominant in the south of the range and the darker forms prevalent further north.
The wingspan is 28–36 mm. "Forewing with basal area grey, outer area red-brown; the lines and stigmata grey; hindwing dull grey with a dark lunule and transverse line and the fringe reddish; as a rule the male is paler than the female; a very variable species alike in colour and plainness of markings; ab. congener Hbn. is wholly red-brown with the stigmata yellowish; -ab. subrufa Haw. is distinguished by having the cell dark at base and between the stigmata; — ab. conflua H.-S. nec Tr. has the ground colour reddish ochreous mottled with darker; — ab. mendica F. is like the last but shows black or dark brown spaces in the cell; — ab. ignicola H.-Sch. has the ground colour yellowish ochreous, with... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 3 | Bavarian Forest National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom | |
| 2 | Liverpool | 🇬🇧 United Kingdom | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | London | 🇬🇧 United Kingdom |
With luck
About 10% of wildlife watchers report an Ingrailed Clay sighting in Cairngorms National Park on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 219th most-seen of the 300 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.
June and July
In those months about 10% of wildlife watchers report an Ingrailed Clay in Cairngorms National Park on a given day, against under 5% in August to May, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Ingrailed Clay 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.
Among the best
Of the 3 parks where we can rate Ingrailed Clay sightings, Cairngorms National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Snowdonia National Park (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Ingrailed Clay is recorded against all the insects logged in Cairngorms National Park (16 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.
