Necrodes littoralis
In 3 days ~10% in a week ~20%
Necrodes littoralis, also known as the shore sexton beetle, is a species of carrion beetle of the genus Necrodes, found in countries across Europe. As a carrion beetle, it feeds on decaying vertebrate remains and maggots. This species' feeding behaviors make it an important asset to forensic entomology.
Adults of N. littoralis grow to be 15 to 25 mm (0.59 to 0.98 in) long and have a shiny black body. The beetles can be identified by a characteristic bump about three quarters down the length of their elytra, a hardened forewing that act as armor to protect the beetle from environmental factors and predators. Beetles of the order Coleoptera, like N. littoralis, have truncated elytra. The reason why some beetle species have adapted a shortened protection armor is unclear. The larvae of N. littoralis are campodeiform, meaning they have a flattened body, antennae, and have well-developed legs.
N. littoralis has a Palearctic distribution, but most observations are reported across Europe. They have been observed in Austria, Hungary, Slovakia, Czech Republic, Belgium, France, and England. Outside of Europe, N. littoralis has been observed in South Korea... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 2 | Cévennes National Park | 🇫🇷 France | |
| 3 | Pyrénées National Park | 🇫🇷 France | |
| 4 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Paris | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a Shore Sexton Beetle sighting in Paris on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 686th most-seen of the 916 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.
August
In that month about 10% of wildlife watchers report a Shore Sexton Beetle in Paris on a given day, against under 5% in September to July, the lowest months.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Shore Sexton Beetle sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Only Paris, in our data
Paris is the only city on Wallace's Line with enough records to rate Shore Sexton 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 Shore Sexton Beetle is recorded against all the insects logged in Paris (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.
