A common blue damselfly at Queen Elizabeth II Country Park, England

From Wikipedia:

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.[1] 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.

Image Details
Date: 15 June 2021
Camera body: Nikon D50
Lens: Tamron 70.0-300.0 mm f/4.0-5.6
Focal Length: 300mm
Aperture: ƒ/5.6
Shutter Speed: 1/1,000s
ISO: 280
Licence: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International