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 Saint Petersburg on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 295th 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 20%, if each day is a fresh chance.
June
In that month about 10% of wildlife watchers report a Birch Leaf-Rolling Weevil in Saint Petersburg on a given day, against under 5% in July to May, 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.
Among the best
Of the 3 cities where we can rate Birch Leaf-Rolling Weevil sightings, Saint Petersburg ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Helsinki (Finland, under 5%).
Same order: Coleoptera
The closest relatives of the Birch Leaf-Rolling Weevil that you can see in Saint Petersburg (order Coleoptera, Beetles) are Two-Spotted Lady Beetle (about 10%), Seven-Spotted Lady Beetle (about 10%) and Alder Leaf Beetle (about 10%), 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 Saint Petersburg (7 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.
