Dasineura fraxini
In 3 days ~10% in a week ~20%
Dasineura fraxini is a gall midge which forms galls on the leaves and petioles of ash (Fraxinus species). It was first described by Johann Jacob Bremi-Wolf in 1847. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Ash Midrib Gall Midge sighting in Vienna on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 895th 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Ash Midrib Gall Midge in Vienna on a given day, so our monthly data shows no clear season.
Among the best
Of the 3 cities where we can rate Ash Midrib Gall Midge sightings, Vienna ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in London (United Kingdom, under 5%) and Paris (France, under 5%).
GBIF citizen-science records
It is estimated from how often the Ash Midrib Gall Midge is recorded against all the insects logged in Vienna (10 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.
