Cryptorhynchus lapathi
In 3 days ~10% in a week ~30%
Cryptorhynchus lapathi is a species of weevil native to Europe. Its common names include poplar and willow borer, osier weevil, and willow weevil. This weevil has long been known as a pest insect of willows cultivated for basketry. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Bear Rainforest | 🇨🇦 Canada | |
| 2 | Olympic National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saint Petersburg | 🇷🇺 Russia | |
| 2 | Calgary | 🇨🇦 Canada | |
| 3 | Vancouver | 🇨🇦 Canada | |
| 4 | Seattle | 🇺🇸 United States | |
| 5 | Montreal | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Poplar-And-Willow Borer sighting in Saint Petersburg on a given day, based on 23 verified sightings from GBIF citizen-science data. It is the 105th most-seen of the 448 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.
July and August
In those months about 10% of wildlife watchers report a Poplar-And-Willow Borer in Saint Petersburg on a given day, against under 5% in September to June, the lowest months. Those are among Saint Petersburg's wettest months, with about 100 mm of rain a month against 40 mm in February.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Poplar-And-Willow Borer sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Yes
Of the 5 cities where we can rate Poplar-And-Willow Borer sightings, Saint Petersburg has the highest daily chance: under 5%. Next come Calgary (Canada, under 5%) and Vancouver (Canada, under 5%).
Same family: Curculionidae
The closest relatives of the Poplar-And-Willow Borer that you can see in Saint Petersburg (family Curculionidae, True Weevils) are Nettle Weevil (about 10%), Strawberry Root Weevil (about 10%) and Black Vine Weevil (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Poplar-And-Willow Borer is recorded against all the insects logged in Saint Petersburg (23 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.
