Anax imperator
In 3 days ~40% in a week ~70%
The emperor dragonfly or blue emperor (Anax imperator) is a large species of hawker dragonfly of the family Aeshnidae. It is the largest dragonfly in most of Europe, including the United Kingdom, although exceeded in some areas by other species.
The generic name Anax is from the ancient Greek ἄναξ, "lord"; the specific epithet imperator is the Latin for "emperor", from imperare, to command. This dragonfly has a wide distribution through Afroeurasia; it is found throughout Africa and through most of Europe, the Arabian Peninsula, and south-western and central Asia. Since the 1990s, its range has expanded in Europe, both northwards and to higher altitudes. For example, the first Scandinavian record was in 1994 in Denmark; in 2002 it was first recorded in Sweden and in 2004 first in Scotland; today it is regular in all three countries. The species' northward expansion has been tied to global warming, and it is among the first odonata to do so.
The emperor dragonfly is a large and bulky species. It is 73–82 mm (2.9–3.2 in) long, with average being 78 mm (3.1 in) and males growing larger than females. The average wingspan is 104... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Plitvice Lakes National Park | 🇭🇷 Croatia | |
| 2 | iSimangaliso Wetland Park | 🇿🇦 South Africa | |
| 3 | Mercantour National Park | 🇫🇷 France | |
| 4 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 5 | Garden Route National Park | 🇿🇦 South Africa | |
| 6 | West Coast National Park | 🇿🇦 South Africa | |
| 7 | Cévennes National Park | 🇫🇷 France | |
| 8 | Pilanesberg National Park | 🇿🇦 South Africa | |
| 9 | Kruger National Park | 🇿🇦 South Africa | |
| 10 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 11 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 12 | Table Mountain National Park | 🇿🇦 South Africa | |
| 13 | Wadden Sea National Park | 🇩🇪 Germany | |
| 14 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 15 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Ouagadougou | 🇧🇫 Burkina Faso | |
| 2 | Brussels | 🇧🇪 Belgium | |
| 3 | Antananarivo | 🇲🇬 Madagascar | |
| 4 | Jerusalem | 🇮🇱 Israel | |
| 5 | Nairobi | 🇰🇪 Kenya | |
| 6 | Manchester | 🇬🇧 United Kingdom | |
| 7 | London | 🇬🇧 United Kingdom | |
| 8 | Milan | 🇮🇹 Italy | |
| 9 | Leeds | 🇬🇧 United Kingdom | |
| 10 | Turin | 🇮🇹 Italy |
Possible
About 20% of wildlife watchers report a Blue Emperor sighting in Jerusalem on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 59th most-seen of the 137 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.
August
In that month about 40% of wildlife watchers report a Blue Emperor in Jerusalem on a given day, against under 5% in January–May and July, the lowest months. That is one of Jerusalem's driest months, with almost no rain against 90 mm in January.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Blue Emperor 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 39 cities where we can rate Blue Emperor sightings, Jerusalem ranks 4th at about 20%, level with the leaders once rounded. The best odds are in Ouagadougou (Burkina Faso, about 20%), Brussels (Belgium, about 20%) and Antananarivo (Madagascar, about 20%).
Same order: Odonata
The closest relatives of the Blue Emperor that you can see in Jerusalem (order Odonata, Dragonflies and Damselflies) are Blue-Tailed Damselfly (about 20%), Epaulet Skimmer (about 20%) and Broad Scarlet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Blue Emperor is recorded against all the insects logged in Jerusalem (10 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.
