Aegialia arenaria
In 3 days ~20% in a week ~40%
Aegialia arenaria, the dune scarab beetle, is a species of beetle in the family Scarabaeidae. It is found in the Palearctic and Nearctic. It is a coastal species found on sand dunes of western and northern Europe (Netherlands, Belgium, France (Nord-Pas-de-Calais), Germany, Denmark, Portugal, Spain, Britain, Ireland, Norway, Sweden, Finland) and in the Nearctic from Nova Scotia in Canada (Sable Island), to Massachusetts and New Hampshire. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report an Aegialia arenaria sighting in Snowdonia National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 264th most-seen of the 387 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.
December
In that month about 30% of wildlife watchers report an Aegialia arenaria in Snowdonia National Park on a given day, against under 5% in January–March, May, July and September–November, the lowest months. That is one of Snowdonia National Park's wettest months, with about 240 mm of rain against 95 mm in April.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Aegialia arenaria sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Aegialia arenaria sightings, Snowdonia National Park has the highest daily chance: about 10%. Next come Wadden Sea National Park (Germany, about 10%).
Same family: Scarabaeidae
The closest relatives of the Aegialia arenaria that you can see in Snowdonia National Park (family Scarabaeidae, Scarabs) are Garden Chafer (about 30%), Common Cockchafer (about 20%) and Dune Chafer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Aegialia arenaria is recorded against all the insects logged in Snowdonia National Park (7 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.
