Polydrusus impressifrons
In 3 days ~20% in a week ~40%
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 |
With luck
About 10% of wildlife watchers report a Pale Green Weevil sighting in Riding Mountain National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 76th most-seen of the 104 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
June
In that month about 20% of wildlife watchers report a Pale Green Weevil in Riding Mountain National Park on a given day, against under 5% in July to May, the lowest months. That is one of Riding Mountain National Park's wettest months, with about 100 mm of rain against 20 mm in February.
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.
Among the best
Of the 3 parks where we can rate Pale Green Weevil sightings, Riding Mountain National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Grand Teton National Park (United States, about 10%) and Glacier National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Pale Green Weevil is recorded against all the insects logged in Riding Mountain National Park (6 verified sightings from 2019 to 2026), 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.
