Polydrusus formosus
In 3 days ~10% in a week ~30%
Polydrusus formosus, commonly known as the green immigrant leaf weevil, is a species of broad-nosed weevil belonging to the family Curculionidae, subfamily Entiminae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Gros Morne National Park | 🇨🇦 Canada | |
| 2 | Isle Royale National Park | 🇺🇸 United States | |
| 3 | Voyageurs National Park | 🇺🇸 United States | |
| 4 | Elk Island National Park | 🇨🇦 Canada | |
| 5 | Riding Mountain National Park | 🇨🇦 Canada | |
| 6 | Cape Breton Highlands National Park | 🇨🇦 Canada | |
| 7 | Acadia National Park | 🇺🇸 United States | |
| 8 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 9 | Wadden Sea National Park | 🇩🇪 Germany | |
| 10 | Point Pelee National Park | 🇨🇦 Canada | |
| 11 | Shenandoah National Park | 🇺🇸 United States | |
| 12 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom | |
| 2 | Liverpool | 🇬🇧 United Kingdom | |
| 3 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 4 | Manchester | 🇬🇧 United Kingdom | |
| 5 | Amsterdam | 🇳🇱 Netherlands | |
| 6 | Hamburg | 🇩🇪 Germany | |
| 7 | Turin | 🇮🇹 Italy | |
| 8 | Copenhagen | 🇩🇰 Denmark | |
| 9 | Essen | 🇩🇪 Germany | |
| 10 | Paris | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a Green Immigrant Leaf Weevil sighting in Shenandoah National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 630th most-seen of the 723 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May and June
In those months about 10% of wildlife watchers report a Green Immigrant Leaf Weevil in Shenandoah National Park on a given day, against under 5% in July to April, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Green Immigrant Leaf Weevil sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
11th of 12
Of the 12 parks where we can rate Green Immigrant Leaf Weevil sightings, Shenandoah National Park ranks 11th at under 5%. The best odds are in Gros Morne National Park (Canada, about 30%), Isle Royale National Park (United States, about 30%) and Voyageurs National Park (United States, about 20%).
Same family: Curculionidae
The closest relatives of the Green Immigrant Leaf Weevil that you can see in Shenandoah National Park (family Curculionidae, True Weevils) are Yellow Poplar Weevil (about 10%), Asian Oak Weevil (about 10%) and Peach Root Weevil (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Green Immigrant Leaf Weevil is recorded against all the insects logged in Shenandoah National Park (5 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.
