Nepa cinerea
In 3 days ~10% in a week ~20%
Nepa cinerea is a species of water scorpion (Nepidae), found in most of Europe, including the British Isles, as well as North Africa and southern and northern Asia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Monfragüe National Park | 🇪🇸 Spain | |
| 3 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 5 | Pyrénées National Park | 🇫🇷 France | |
| 6 | Wadden Sea National Park | 🇩🇪 Germany | |
| 7 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom | |
| 2 | Birmingham | 🇬🇧 United Kingdom | |
| 3 | Copenhagen | 🇩🇰 Denmark | |
| 4 | Manchester | 🇬🇧 United Kingdom | |
| 5 | Cologne | 🇩🇪 Germany | |
| 6 | Minsk | 🇧🇾 Belarus | |
| 7 | Madrid | 🇪🇸 Spain | |
| 8 | Essen | 🇩🇪 Germany | |
| 9 | Prague | 🇨🇿 Czechia | |
| 10 | Kyiv | 🇺🇦 Ukraine |
Rare
Under 5% of wildlife watchers report a Eurasian Water Scorpion sighting in Sierra de Guadarrama National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 473rd most-seen of the 597 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
February, June and October
In those months about 10% of wildlife watchers report a Eurasian Water Scorpion in Sierra de Guadarrama National Park on a given day, against under 5% in March–May, July–September and November–January, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Eurasian Water Scorpion sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
7th of 7
Of the 7 parks where we can rate Eurasian Water Scorpion sightings, Sierra de Guadarrama National Park ranks 7th at under 5%. The best odds are in Cévennes National Park (France, about 10%), Monfragüe National Park (Spain, about 10%) and Fertő-Hanság National Park (Hungary, about 10%).
Same order: Hemiptera
The closest relatives of the Eurasian Water Scorpion that you can see in Sierra de Guadarrama National Park (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Red Shield Bug (about 20%), European Striped Shield Bug (about 10%) and Spilostethus saxatilis (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Eurasian Water Scorpion is recorded against all the insects logged in Sierra de Guadarrama National Park (6 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.
