Cynips quercusfolii
In 3 days ~10% in a week ~30%
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 |
Rare
Under 5% of wildlife watchers report a Cherry Gall Wasp sighting in Essen on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 282nd most-seen of the 434 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.
February, August–September and November
In those months about 10% of wildlife watchers report a Cherry Gall Wasp in Essen on a given day, against under 5% in March–July, October and December–January, 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.
19th of 22
Of the 22 cities where we can rate Cherry Gall Wasp sightings, Essen ranks 19th at under 5%. The best odds are in Kharkiv (Ukraine, about 30%), Kyiv (Ukraine, about 10%) and Sofia (Bulgaria, about 10%).
GBIF citizen-science records
It is estimated from how often the Cherry Gall Wasp is recorded against all the insects logged in Essen (8 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.
