Orthetrum coerulescens
In 3 days ~20% in a week ~40%
The keeled skimmer (Orthetrum coerulescens) is a species of dragonfly belonging to the family Libellulidae. The keeled skimmer is common in central and southern Europe, marginally entering into Russia, and in North Africa. It is locally common in western Britain and Ireland.
This species is present in Afghanistan; Albania; Algeria; Armenia; Austria; Azerbaijan; Bosnia and Herzegovina; Bulgaria; Croatia; Cyprus; Czech Republic; Denmark; Finland; France; Georgia; Greece; Hungary; Iran, Islamic Republic of; Iraq; Ireland; Italy; Lebanon; Liechtenstein; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Montenegro; Morocco; Netherlands; Norway; Poland; Portugal; Romania; Russian Federation; Serbia; Slovakia; Slovenia; Spain; Sweden; Switzerland; Syrian Arab Republic; Tunisia; Turkey; Ukraine; United Kingdom.
The typical habitats of Orthetrum coerulescens are pools and streams in acidic heath land, where it is sometimes seen alongside golden-ringed dragonflies. Pools and streams in wet heathland sites are favoured. Orthetrum coerulescens can reach a body length of 40–44 millimetres (1.6–1.7 in). These dragonflies have a... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Plitvice Lakes National Park | 🇭🇷 Croatia | |
| 2 | Aigüestortes National Park | 🇪🇸 Spain | |
| 3 | Cévennes National Park | 🇫🇷 France | |
| 4 | Pyrénées National Park | 🇫🇷 France | |
| 5 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 6 | Mercantour National Park | 🇫🇷 France | |
| 7 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 8 | Snowdonia National Park | 🇬🇧 United Kingdom |
With luck
About 10% of wildlife watchers report a Keeled Skimmer sighting in Vienna on a given day, based on 88 verified sightings from GBIF citizen-science data. It is the 211th most-seen of the 1406 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
June to August
In those months about 10% of wildlife watchers report a Keeled Skimmer in Vienna on a given day, against under 5% in September to May, the lowest months. Those are among Vienna's wettest months, with about 90 mm of rain a month against 40 mm in February.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Keeled Skimmer sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
14th of 20
Of the 20 cities where we can rate Keeled Skimmer sightings, Vienna ranks 14th at about 10%. The best odds are in Rostov-on-Don (Russia, about 20%), Antalya (Turkey, about 20%) and Athens (Greece, about 20%).
GBIF citizen-science records
It is estimated from how often the Keeled Skimmer is recorded against all the insects logged in Vienna (88 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.
