Apoderus coryli
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Hazel Leaf-Roller Weevil sighting in Vienna on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 1090th most-seen of the 1406 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Hazel Leaf-Roller Weevil in Vienna on a given day, so our monthly data shows no clear season.
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.
4th of 4
Of the 4 cities where we can rate Hazel Leaf-Roller Weevil sightings, Vienna ranks 4th at under 5%. The best odds are in Hamburg (Germany, about 10%), Birmingham (United Kingdom, under 5%) and Kyiv (Ukraine, under 5%).
GBIF citizen-science records
It is estimated from how often the Hazel Leaf-Roller Weevil is recorded against all the insects logged in Vienna (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.
