Apoderus coryli
In 3 days ~20% in a week ~40%
Apoderus coryli, the hazel-leaf roller weevil, is a species of leaf-rolling beetles belonging to the family Attelabidae subfamily Attelabinae. Because of the trunk-like elongated head, it is often mistakenly attributed to the weevil family Curculionidae.
This species is widespread in most of Europe (Albania, Austria, Belarus, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Luxembourg, Slovakia, United Kingdom), in the eastern Palearctic realm (China and Japan), and in the Near East.
Apoderus coryli prefers deciduous forests, especially at forest edges, but also parks and gardens where the host plant, Corylus avellana, occurs. Apoderus coryli can reach a length of 6–8 millimetres (0.24–0.31 in). These primitive weevils have a red shiny bell-shaped pronotum, a shiny black or dark brown head with protruding eyes, a distinct neck and short and rounded elytra. Their straight antennae are inserted near the base of the rostrum. The prothorax is much narrower than the base of the elytra on the abdomen. The scutellum is broad, triangular to trapezoidal and without stripes. The... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Białowieża National Park | 🇵🇱 Poland | |
| 2 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 3 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 4 | Pyrénées National Park | 🇫🇷 France | |
| 5 | Cévennes National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hamburg | 🇩🇪 Germany | |
| 2 | Birmingham | 🇬🇧 United Kingdom | |
| 3 | Kyiv | 🇺🇦 Ukraine | |
| 4 | Vienna | 🇦🇹 Austria |
With luck
About 10% of wildlife watchers report a Hazel Leaf-Roller Weevil sighting in Bavarian Forest National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 347th most-seen of the 1115 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
May to September
In those months about 10% of wildlife watchers report a Hazel Leaf-Roller Weevil in Bavarian Forest National Park on a given day, against under 5% in October to April, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Hazel Leaf-Roller Weevil sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 5 parks where we can rate Hazel Leaf-Roller Weevil sightings, Bavarian Forest National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Białowieża National Park (Poland, about 10%) and Snowdonia National Park (United Kingdom, about 10%).
Same family: Attelabidae
The closest relatives of the Hazel Leaf-Roller Weevil that you can see in Bavarian Forest National Park (family Attelabidae, Leaf-rolling Weevils) are Byctiscus populi (about 10%) and Birch Leaf-Rolling Weevil (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hazel Leaf-Roller Weevil is recorded against all the insects logged in Bavarian Forest National Park (15 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.
