Cynips quercusfolii
In 3 days ~20% in a week ~50%
Cynips quercusfolii, also known as the cherry gall wasp and common oak gall wasp, is a gall wasp species in the genus Cynips and family Cynipidae. The species is important for the production of commercial nutgall formed on Quercus lusitanica (the gall oak).
Galls are located on the underside of leaves, with the majority of galls being on the second and third veins from the petiole of the leaf. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Białowieża National Park | 🇵🇱 Poland | |
| 2 | Gauja National Park | 🇱🇻 Latvia | |
| 3 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 4 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 5 | Wadden Sea National Park | 🇩🇪 Germany | |
| 6 | Cévennes National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Cherry Gall Wasp sighting in Bavarian Forest National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 205th most-seen of the 1115 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
September–October and December–January
In those months about 20% of wildlife watchers report a Cherry Gall Wasp in Bavarian Forest National Park on a given day, against under 5% in March, May–June and November, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Cherry Gall Wasp sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 6
Of the 6 parks where we can rate Cherry Gall Wasp sightings, Bavarian Forest National Park ranks 3rd at about 10%. The best odds are in Białowieża National Park (Poland, about 20%) and Gauja National Park (Latvia, about 20%).
GBIF citizen-science records
It is estimated from how often the Cherry Gall Wasp is recorded against all the insects logged in Bavarian Forest National Park (23 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.
