Ceutorhynchus obstrictus
In 3 days ~10% in a week ~20%
Ceutorhynchus obstrictus, the cabbage seedpod weevil, is a species of snout beetles or true weevils which is widespread in Europe and lives on several types of crucifers. The adult weevils feed on the leaves, but breed in the seedpods, where the larvae destroy the seeds. It can be a harmful pest on crops like rapeseed/canola (Brassica napus), cabbage and relatives (Brassica oleracea) or Brassica rapa.
C. obstrictus is native to Europe and is also found in parts of Asia. Starting in the early 1930s it has been reported from North America (as Ceutorhynchus assimilis, a misidentification). It was first collected in Washington State and near Vancouver in western Canada. It is now more widely distributed in North America, especially in regions growing rapeseed (canola) where it is regarded as an important invasive pest.
Both are separate species and both are common in Europe, with C. obstrictus being on average slightly larger (typically 3–4 mm). The species found in North America has long been referred to as Ceutorhynchus... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Berlin | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Cabbage Seed Weevil sighting in Berlin on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 949th most-seen of the 1065 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.
April
In that month about 10% of wildlife watchers report a Cabbage Seed Weevil in Berlin on a given day, against under 5% in May to March, the lowest months. That is one of Berlin's driest months, with about 30 mm of rain against 80 mm in July.
Only Berlin, in our data
Berlin is the only city on Wallace's Line with enough records to rate Cabbage Seed 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 Cabbage Seed Weevil is recorded against all the insects logged in Berlin (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.
