Carabus nemoralis
In 3 days ~30% in a week ~50%
Carabus nemoralis (commonly called the "Bronze carabid") is a ground beetle common in central and northern Europe, as well as Iceland and Canada. While native to Europe, it has been introduced to and is expanding its range throughout North America. It is 20-25mm long and found in many habitats in Great Britain.
Carabus nemoralis is a beneficial predator as it eats the agricultural pest Deroceras reticulatum slug in its young stage and also its eggs. Use of Carabus nemoralis as a biocontrol agent for multiple pests in large scale farming operations have been tested in recent years. Larvae are voracious hunters, resembling rove beetles. They can be found preying on annelids and slugs during early summer months.
It is known that some Carabus nemoralis populations will regurgitate foul-smelling brownish-red liquid as a defense mechanism against predators. Specimens can also fire fecal matter at high speed to a considerable distance, if picked up or otherwise threatened.
Carabus nemoralis typically has one breeding period in the spring with eggs hatching in autumn of the same year. The adults are found all... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Białowieża National Park | 🇵🇱 Poland | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Cape Breton Highlands National Park | 🇨🇦 Canada | |
| 4 | Pyrénées National Park | 🇫🇷 France | |
| 5 | Cévennes National Park | 🇫🇷 France | |
| 6 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 7 | Great Bear Rainforest | 🇨🇦 Canada | |
| 8 | Wadden Sea National Park | 🇩🇪 Germany | |
| 9 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 10 | Glacier National Park | 🇺🇸 United States | |
| 11 | Olympic National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Seattle | 🇺🇸 United States | |
| 3 | Copenhagen | 🇩🇰 Denmark | |
| 4 | Calgary | 🇨🇦 Canada | |
| 5 | Nizhny Novgorod | 🇷🇺 Russia | |
| 6 | Edmonton | 🇨🇦 Canada | |
| 7 | Kyiv | 🇺🇦 Ukraine | |
| 8 | Vancouver | 🇨🇦 Canada | |
| 9 | Portland | 🇺🇸 United States | |
| 10 | Montreal | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Bronze Ground Beetle sighting in Portland on a given day, based on 134 verified sightings from GBIF citizen-science data. It is the 54th most-seen of the 507 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
March
In that month about 20% of wildlife watchers report a Bronze Ground Beetle in Portland on a given day, against under 5% in January, the lowest month. That is one of Portland's wettest months, with about 180 mm of rain against 10 mm in July.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Bronze Ground Beetle 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.
9th of 31
Of the 31 cities where we can rate Bronze Ground Beetle sightings, Portland ranks 9th at about 10%. The best odds are in Helsinki (Finland, about 20%), Seattle (United States, about 10%) and Copenhagen (Denmark, about 10%).
Same family: Carabidae
The closest relatives of the Bronze Ground Beetle that you can see in Portland (family Carabidae, Ground Beetles) are European Gazelle Beetle (about 10%), Audouin's Night-Stalking Tiger Beetle (about 10%) and Narrow-Collared Snail-Eating Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Bronze Ground Beetle is recorded against all the insects logged in Portland (134 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.
