Romualdius scaber
In 3 days ~10% in a week ~20%
Romualdius scaber, known generally as the crusted root weevil or crusted grass weevil, is a species of broad-nosed weevil in the beetle family Curculionidae. It is found in Europe and North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Calgary | 🇨🇦 Canada | |
| 2 | Seattle | 🇺🇸 United States | |
| 3 | Saint Petersburg | 🇷🇺 Russia | |
| 4 | Vancouver | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Crusted Root Weevil sighting in Saint Petersburg on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 332nd most-seen of the 448 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Crusted Root Weevil in Saint Petersburg on a given day, so our monthly data shows no clear season.
Among the best
Of the 4 cities where we can rate Crusted Root Weevil sightings, Saint Petersburg ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Calgary (Canada, under 5%) and Seattle (United States, under 5%).
Same family: Curculionidae
The closest relatives of the Crusted Root Weevil that you can see in Saint Petersburg (family Curculionidae, True Weevils) are Nettle Weevil (about 10%), Strawberry Root Weevil (about 10%) and Black Vine Weevil (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Crusted Root Weevil is recorded against all the insects logged in Saint Petersburg (8 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.
