Polydrusus impressifrons
In 3 days ~20% in a week ~30%
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 Denver on a given day, based on 42 verified sightings from GBIF citizen-science data. It is the 123rd most-seen of the 461 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
April to June
In those months about 10% of wildlife watchers report a Pale Green Weevil in Denver on a given day, against under 5% in July to March, the lowest months.
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 11 cities where we can rate Pale Green Weevil sightings, Denver ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Calgary (Canada, about 10%).
Same family: Curculionidae
The closest relatives of the Pale Green Weevil that you can see in Denver (family Curculionidae, True Weevils) are Black Vine Weevil (about 10%) and Canada Thistle Bud Weevil (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pale Green Weevil is recorded against all the insects logged in Denver (42 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.
