Promecognathus laevissimus
In 3 days ~10%
Promecognathus laevissimus, also known as the smooth millipede hunter, is a species of ground beetle in the family Carabidae. It is found in western North America, including Oregon, California, and Nevada. P. laevissimus is closely related to Promecognathus crassus. Like P. crassus, P. laevissimus uses its large jaws to feed on millipedes, including those that produce hydrogen cyanide and benzaldehyde, like Xystocheir dissecta. It has a high tolerance to these toxins.
Adult P. laevissimus are glossy black beetles 5–18 millimetres (0.20–0.71 in) long with long jaws and a narrow thorax. They are nocturnal. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Promecognathus laevissimus sighting in San Francisco on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 518th most-seen of the 737 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Promecognathus laevissimus in San Francisco on a given day, so our monthly data shows no clear season.
Only San Francisco, in our data
San Francisco is the only city on Wallace's Line with enough records to rate Promecognathus laevissimus sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Promecognathus laevissimus is recorded against all the insects logged in San Francisco (9 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.
