What are the chances of seeing a Xylotrechus arvicola in Vienna?
Rare
Under 5% of wildlife watchers report a Xylotrechus arvicola sighting in Vienna on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 760th 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.
When is the best time to see a Xylotrechus arvicola in Vienna?
June and July
In those months about 10% of wildlife watchers report a Xylotrechus arvicola in Vienna on a given day, against under 5% in August to May, the lowest months. Those are among Vienna's wettest months, with about 90 mm of rain a month against 40 mm in February.
Is Vienna the best place to see a Xylotrechus arvicola?
Among the best
Of the 6 cities where we can rate Xylotrechus arvicola sightings, Vienna ranks 6th at under 5%, level with the leaders once rounded. The best odds are in Bucharest (Romania, under 5%), Lyon (France, under 5%) and Paris (France, under 5%).
Where does the Xylotrechus arvicola sighting chance come from?
GBIF citizen-science records
It is estimated from how often the Xylotrechus arvicola is recorded against all the insects logged in Vienna (13 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.