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 Porto on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 422nd most-seen of the 498 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.
March
In that month about 10% of wildlife watchers report a Eurasian Water Scorpion in Porto on a given day, against under 5% in April to February, 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.
14th of 17
Of the 17 cities where we can rate Eurasian Water Scorpion sightings, Porto ranks 14th at under 5%. The best odds are in London (United Kingdom, about 10%), Birmingham (United Kingdom, about 10%) and Copenhagen (Denmark, about 10%).
Same order: Hemiptera
The closest relatives of the Eurasian Water Scorpion that you can see in Porto (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Green Leafhopper (about 10%), European Firebug (about 10%) and European Striped Shield Bug (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 Porto (7 verified sightings), 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.
