Mikiola fagi
In 3 days ~30% in a week ~60%
Mikiola fagi, the beech gall midge is a gall-causing fly in the family Cecidomyiidae. This species was first described by Theodor Hartig in 1839. According to observations of the species aggregated on GBIF, this fly spreads across Europe. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Plitvice Lakes National Park | 🇭🇷 Croatia | |
| 2 | Triglav National Park | 🇸🇮 Slovenia | |
| 3 | Ordesa y Monte Perdido National Park | 🇪🇸 Spain | |
| 4 | Aigüestortes National Park | 🇪🇸 Spain | |
| 5 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 6 | Picos de Europa National Park | 🇪🇸 Spain | |
| 7 | Cévennes National Park | 🇫🇷 France | |
| 8 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom | |
| 2 | Leeds | 🇬🇧 United Kingdom | |
| 3 | Copenhagen | 🇩🇰 Denmark | |
| 4 | Essen | 🇩🇪 Germany | |
| 5 | Munich | 🇩🇪 Germany | |
| 6 | Cologne | 🇩🇪 Germany | |
| 7 | Hamburg | 🇩🇪 Germany | |
| 8 | Berlin | 🇩🇪 Germany | |
| 9 | Prague | 🇨🇿 Czechia | |
| 10 | Brussels | 🇧🇪 Belgium |
With luck
About 10% of wildlife watchers report a Beech Gall Midge sighting in Picos de Europa National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 85th most-seen of the 118 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
May, July and October
In those months about 20% of wildlife watchers report a Beech Gall Midge in Picos de Europa National Park on a given day, against under 5% in June, September and November–April, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Beech Gall Midge sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
6th of 8
Of the 8 parks where we can rate Beech Gall Midge sightings, Picos de Europa National Park ranks 6th at about 10%. The best odds are in Plitvice Lakes National Park (Croatia, about 30%), Triglav National Park (Slovenia, about 30%) and Ordesa y Monte Perdido National Park (Spain, about 20%).
Same order: Diptera
The closest relatives of the Beech Gall Midge that you can see in Picos de Europa National Park (order Diptera, Flies) are Common Drone Fly (about 20%), Marmalade Hover Fly (about 10%) and Common Globetail (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Beech Gall Midge is recorded against all the insects logged in Picos de Europa National Park (6 verified sightings from 2019 to 2026), 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.
