Dasineura fraxini
In 3 days ~10% in a week ~30%
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 |
|---|
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Ash Midrib Gall Midge sighting in London on a given day, based on 36 verified sightings from GBIF citizen-science data. It is the 559th most-seen of the 1504 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
June and September–October
In those months about 10% of wildlife watchers report an Ash Midrib Gall Midge in London on a given day, against under 5% in July–August and November–May, the lowest months.
Yes
Of the 3 cities where we can rate Ash Midrib Gall Midge sightings, London has the highest daily chance: under 5%. Next come Paris (France, under 5%) and Vienna (Austria, 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 London (36 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.
