Colymbetes fuscus
In 3 days ~10% in a week ~20%
Colymbetes fuscus is a species of beetle native to the Palearctic, including Europe, the Near East and North Africa. In Europe, it is only found in Austria, the Balearic Islands, Belarus, Belgium, Bosnia and Herzegovina, Great Britain including Shetland, Orkney, Hebrides and Isle of Man, Bulgaria, the Channel Islands, Corsica, Croatia, Cyprus, the Czech Republic, mainland Denmark, Estonia, European Turkey, Finland, mainland France, Germany, mainland Greece, Hungary, the Republic of Ireland, mainland Italy, Kaliningrad, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Northern Ireland, North Macedonia, mainland Norway, Poland, mainland Portugal, Russia except in the North, Sardinia, Sicily, Slovakia, Slovenia, mainland Spain, Sweden, Switzerland, the Netherlands, Ukraine and Yugoslavia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wadden Sea National Park | 🇩🇪 Germany |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Porto | 🇵🇹 Portugal | |
| 2 | London | 🇬🇧 United Kingdom | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | Berlin | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Large-Grooved Diving Beetle sighting in Wadden Sea National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 630th most-seen of the 818 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.
April and November
In those months about 10% of wildlife watchers report a Large-Grooved Diving Beetle in Wadden Sea National Park on a given day, against under 5% in May–October and December–March, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Large-Grooved Diving Beetle sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Wadden Sea National Park, in our data
Wadden Sea National Park is the only park on Wallace's Line with enough records to rate Large-Grooved Diving Beetle sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Large-Grooved Diving Beetle is recorded against all the insects logged in Wadden Sea 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.
