Polydrusus impressifrons
In 3 days ~10%
Polydrusus impressifrons, known generally as the pale green weevil or leaf weevil, is a species of broad-nosed weevil in the beetle family Curculionidae. It is native to Europe, but was introduced to North America in the early 20th Century. They feed on fruit trees and hardwood trees. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Grand Teton National Park | 🇺🇸 United States | |
| 2 | Glacier National Park | 🇺🇸 United States | |
| 3 | Riding Mountain National Park | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Calgary | 🇨🇦 Canada | |
| 2 | Denver | 🇺🇸 United States | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Salt Lake City | 🇺🇸 United States | |
| 5 | Munich | 🇩🇪 Germany | |
| 6 | Paris | 🇫🇷 France | |
| 7 | Copenhagen | 🇩🇰 Denmark | |
| 8 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 9 | Montreal | 🇨🇦 Canada | |
| 10 | London | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report a Pale Green Weevil sighting in San Francisco on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 622nd 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 Pale Green Weevil in San Francisco on a given day, so our monthly data shows no clear season.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Pale Green Weevil sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
11th of 11
Of the 11 cities where we can rate Pale Green Weevil sightings, San Francisco ranks 11th at under 5%. The best odds are in Calgary (Canada, about 10%), Denver (United States, about 10%) and Toronto (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Pale Green Weevil is recorded against all the insects logged in San Francisco (6 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.
