Curculio nucum
In 3 days ~10%
Curculio nucum, the nut weevil, is a medium-sized beetle, with an especially elongated snout, characteristic of the Curculionini tribe of the weevil family (Curculionidae). Its larvae develop in hazel nuts Corylus avellana, being a serious pest in hazelnut orchards. It occurs in most of Europe, from south Sweden, Finland and Great Britain to the Mediterranean.
This weevil ranges from 6 to 8.5 mm. The female's snout is as long as the rest of the body, with a reddish end. The male snout is about 1/3 shorter. The body cover is usually light brown, similar to the colour of mature hazelnuts.
This species is often confused with another commonly occurring weevil of the same genera – the gland weevil, Curculio glandium, which lives on oaks. Despite overall similarity, the weevils differ in some morphological details. Curculio nucum has broader segments of flagellum and the segments are covered with semi-erect hairs which in C. glandium are adpressed.
Curculio glandium is considered as closely related to C. nucum and as C. undulatus, all of which are grouped together in the "glandium clade". C. cameliae from Japan is also related to this group. Other similar species in Europe... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Moscow | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report a Nut Weevil sighting in Moscow on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 992nd most-seen of the 1111 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Nut Weevil in Moscow on a given day, so our monthly data shows no clear season.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Nut Weevil sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Moscow, in our data
Moscow is the only city on Wallace's Line with enough records to rate Nut Weevil sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Nut Weevil is recorded against all the insects logged in Moscow (5 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.
