Orthetrum coerulescens
In 3 days ~40% in a week ~70%
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 |
Possible
About 20% of wildlife watchers report a Keeled Skimmer sighting in Algiers on a given day, based on 23 verified sightings from GBIF citizen-science data. It is the 37th most-seen of the 133 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
July
In that month about 40% of wildlife watchers report a Keeled Skimmer in Algiers on a given day, against under 5% in October to April, the lowest months. That is one of Algiers's driest months, with about 5 mm of rain against 90 mm in November.
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.
Among the best
Of the 20 cities where we can rate Keeled Skimmer sightings, Algiers ranks 5th at about 20%, level with the leaders once rounded. The best odds are in Rostov-on-Don (Russia, about 20%), Antalya (Turkey, about 20%) and Athens (Greece, about 20%).
Same genus: Orthetrum
The closest relatives of the Keeled Skimmer that you can see in Algiers (genus Orthetrum) are Epaulet Skimmer (about 20%) and Long Skimmer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Keeled Skimmer is recorded against all the insects logged in Algiers (23 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.
