Caliadurgus fasciatellus
In 3 days ~10% in a week ~20%
Caliadurgus fasciatellus is a species of spider wasp from the subfamily Pepsinae found from Western Europe to the Far East of Asia. The name Caliadurgus was proposed originally by Pate in 1946 as a replacement for a preoccupied name, Calicurgus, published by Lepeletier in 1845. However, Pate explicitly selected Sphex hyalinata as the type species, while Kohl had selected Pompilus fasciatellus to be the type of Lepeletier's genus. Pate and others mistakenly thought that fasciatellus and hyalinata were the same species, but later researchers discovered that these were two different taxa, one now known as Caliadurgus fasciatellus and the other now known as Priocnemis hyalinata.
C. fasciatellus reaches 6–10 millimetres (0.24–0.39 in) in length. The 1st and 2nd segments of the abdomen are brownish red with white spurs in the middle and hind legs. In Europe found from Great Britain east to Russia and Finland south to Spain and the Balkans. In Great Britain it is mainly confined to the south and east.
The flight period in Britain is June to October with a peak in July and August. It is not known what plants are used by the adults... Wikipedia →
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Caliadurgus fasciatellus sighting in Berlin on a given day, based on 5 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Caliadurgus fasciatellus in Berlin on a given day, so our monthly data shows no clear season.
Yes
Of the 2 cities where we can rate Caliadurgus fasciatellus sightings, Berlin has the highest daily chance: under 5%. Next come Montreal (Canada, under 5%).
Same order: Hymenoptera
The closest relatives of the Caliadurgus fasciatellus that you can see in Berlin (order Hymenoptera, Ants, Bees, Wasps, and Sawflies) are Common Carder Bumble Bee (about 30%), European Hornet (about 20%) and German Yellowjacket (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Caliadurgus fasciatellus is recorded against all the insects logged in Berlin (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.
