Cleonis pigra
In 3 days ~20% in a week ~40%
Cleonis pigra, the sluggish weevil or large thistle weevil, is a weevil species recorded in Britain and native to Eurasia. It was introduced into North America to help control creeping thistle. This species develops in the roots of plants in the family Asteraceae.
It appears spelled different ways in the literature: Cleonis piger, Cleonus piger, Cleonus pigra, but the correct spelling under ICZN Article 31.2 is Cleonis pigra It is identified by double V-pattern elytra and a rostrum with three sulci. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Large Thistle Weevil sighting in Fertő-Hanság National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 135th most-seen of the 243 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.
September
In that month about 20% of wildlife watchers report a Large Thistle Weevil in Fertő-Hanság National Park on a given day, against under 5% in July–August and October–March, the lowest months. That is one of Fertő-Hanság National Park's wettest months, with about 80 mm of rain against 30 mm in March.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Large Thistle 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 2 parks where we can rate Large Thistle Weevil sightings, Fertő-Hanság National Park has the highest daily chance: about 10%. Next come Wadden Sea National Park (Germany, under 5%).
Same family: Curculionidae
The closest relatives of the Large Thistle Weevil that you can see in Fertő-Hanság National Park (family Curculionidae, True Weevils) are Lixus iridis (about 10%), Tanymecus palliatus (about 10%) and Eusomus ovulum (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Large Thistle Weevil is recorded against all the insects logged in Fertő-Hanság National Park (7 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.
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