Cordulegaster heros
In 3 days ~10% in a week ~20%
Cordulegaster heros, commonly known as the Balkan goldenring, is a species of central-eastern European spiketail dragonfly. It is assessed as "Least Concern" on the IUCN's Red List. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vienna | 🇦🇹 Austria |
Rare
Under 5% of wildlife watchers report a Balkan Goldenring sighting in Vienna on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 1286th 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 a Balkan Goldenring in Vienna on a given day, so our monthly data shows no clear season.
Only Vienna, in our data
Vienna is the only city on Wallace's Line with enough records to rate Balkan Goldenring sightings: under 5% of wildlife watchers there report one on a given day.
Same order: Odonata
The closest relatives of the Balkan Goldenring that you can see in Vienna (order Odonata, Dragonflies and Damselflies) are Blue Featherleg (about 10%), Blue-Tailed Damselfly (about 10%) and Common Winter Damselfly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Balkan Goldenring is recorded against all the insects logged in Vienna (5 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.
