Polydrusus formosus
In 3 days ~50% in a week ~80%
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 |
Possible
About 20% of wildlife watchers report a Green Immigrant Leaf Weevil sighting in Elk Island National Park on a given day, based on 18 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 27th most-seen of the 112 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
July
In that month about 40% of wildlife watchers report a Green Immigrant Leaf Weevil in Elk Island National Park on a given day, against under 5% in September to May, the lowest months. That is one of Elk Island National Park's wettest months, with about 110 mm of rain against 20 mm in December.
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.
4th of 12
Of the 12 parks where we can rate Green Immigrant Leaf Weevil sightings, Elk Island National Park ranks 4th at about 20%. 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 order: Coleoptera
The closest relatives of the Green Immigrant Leaf Weevil that you can see in Elk Island National Park (order Coleoptera, Beetles) are Seven-Spotted Lady Beetle (about 30%), White-Spotted Sawyer (about 20%) and Cold-Country Caterpillar Hunter (about 20%), 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 Elk Island National Park (18 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.
