Enallagma cyathigerum
In 3 days ~10% in a week ~30%
Enallagma cyathigerum (common blue damselfly or common bluet) is a species found mainly between latitudes 40°N and 72°N; It is widely distributed in the Palearctic, common in all European countries (including Portugal, Spain, France, Great Britain, Ireland, Germany, Sweden, Norway, Finland, Poland, etc.) and in Asia in Turkey, Iran, Russia, and South Korea, and throughout Ontario in North America. The species reaches a length of 29–36 mm (1.1–1.4 in) with wings 18–20 mm (0.71–0.79 in) long. Damselflies are an important link between the health of the aquatic ecosystem and its response to climate change. The closely related Nearctic species Enallagma annexum (northern bluet) was at one time considered to be synonymous with it.
These damselflies inhabit freshwater bodies whose conditions range, they have been seen in acidic fens as well as eutrophic ponds. They have been considered one of the more sensitive insects in an aquatic setting. They are important within the trophic levels as they are an intermediate predator. They consume smaller larvae and they are preyed on by fish and larvae bigger than them.
The larvae prefer a habitat that has a more complex structure in the... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Plitvice Lakes National Park | 🇭🇷 Croatia | |
| 2 | Aigüestortes National Park | 🇪🇸 Spain | |
| 3 | Mercantour National Park | 🇫🇷 France | |
| 4 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 5 | Picos de Europa National Park | 🇪🇸 Spain | |
| 6 | Vanoise National Park | 🇫🇷 France | |
| 7 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 8 | Pyrénées National Park | 🇫🇷 France | |
| 9 | Ecrins National Park | 🇫🇷 France | |
| 10 | Cévennes National Park | 🇫🇷 France | |
| 11 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 12 | Triglav National Park | 🇸🇮 Slovenia | |
| 13 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 14 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom | |
| 2 | Leeds | 🇬🇧 United Kingdom | |
| 3 | London | 🇬🇧 United Kingdom | |
| 4 | Birmingham | 🇬🇧 United Kingdom | |
| 5 | Astana | 🇰🇿 Kazakhstan | |
| 6 | Brussels | 🇧🇪 Belgium | |
| 7 | Munich | 🇩🇪 Germany | |
| 8 | Novosibirsk | 🇷🇺 Russia | |
| 9 | Copenhagen | 🇩🇰 Denmark | |
| 10 | Essen | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Common Blue Damselfly sighting in Saint Petersburg on a given day, based on 53 verified sightings from GBIF citizen-science data. It is the 89th most-seen of the 448 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.
June and July
In those months about 10% of wildlife watchers report a Common Blue Damselfly in Saint Petersburg on a given day, against under 5% in August to May, the lowest months. Those are among Saint Petersburg's wettest months, with about 95 mm of rain a month against 40 mm in February.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Common Blue Damselfly sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
27th of 31
Of the 31 cities where we can rate Common Blue Damselfly sightings, Saint Petersburg ranks 27th at under 5%. The best odds are in Manchester (United Kingdom, about 30%), Leeds (United Kingdom, about 20%) and London (United Kingdom, about 20%).
Same family: Coenagrionidae
The closest relatives of the Common Blue Damselfly that you can see in Saint Petersburg (family Coenagrionidae, Narrow-winged Damselflies) are Azure Damselfly (about 10%) and Variable Bluet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Blue Damselfly is recorded against all the insects logged in Saint Petersburg (53 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.
