Deporaus betulae
In 3 days ~10% in a week ~20%
Deporaus betulae is a species of European weevil that feeds on birches (Betula spp.). It belongs to the family Attelabidae and tribe Deporaini. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Saint Petersburg | 🇷🇺 Russia | |
| 3 | Moscow | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report a Birch Leaf-Rolling Weevil sighting in Helsinki on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 665th most-seen of the 838 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
May
In that month about 10% of wildlife watchers report a Birch Leaf-Rolling Weevil in Helsinki on a given day, against under 5% in June to April, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Birch Leaf-Rolling 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.
Yes
Of the 3 cities where we can rate Birch Leaf-Rolling Weevil sightings, Helsinki has the highest daily chance: under 5%. Next come Saint Petersburg (Russia, under 5%) and Moscow (Russia, under 5%).
Same order: Coleoptera
The closest relatives of the Birch Leaf-Rolling Weevil that you can see in Helsinki (order Coleoptera, Beetles) are Seven-Spotted Lady Beetle (about 30%), Alder Leaf Beetle (about 20%) and Common Red Soldier Beetle (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Birch Leaf-Rolling Weevil is recorded against all the insects logged in Helsinki (6 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.
