Cicada orni
In 3 days ~10% in a week ~30%
Cicada orni, colloquially called the common cicada or ash cicada, is the type species of cicada belonging to the family Cicadidae, subfamily Cicadinae, and the genus Cicada. The genus name comes directly from the Latin cicada 'buzzer', while the species name orni possibly comes from Fraxinus ornus (Manna Ash or South European Flowering Ash), where this cicada often lay its eggs deep in branches. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Pyrénées National Park | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report an Ash Cicada sighting in Vienna on a given day, based on 30 verified sightings from GBIF citizen-science data. It is the 471st 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 30%, if each day is a fresh chance.
July and August
In those months about 10% of wildlife watchers report an Ash Cicada in Vienna on a given day, against under 5% in September to June, the lowest months. Those are among Vienna's wettest months, with about 85 mm of rain a month against 40 mm in February.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Ash Cicada sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
8th of 10
Of the 10 cities where we can rate Ash Cicada sightings, Vienna ranks 8th at under 5%. The best odds are in Athens (Greece, about 50%), Rome (Italy, about 20%) and Lisbon (Portugal, about 20%).
GBIF citizen-science records
It is estimated from how often the Ash Cicada is recorded against all the insects logged in Vienna (30 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.
