In my garden I’ve seen a good variety of dragonflies and damselflies. Living near the mere, a large area of water, they are in much larger numbers than my last house in suburban Hull. Now within damselflies there are 9 almost identical blue damselflies in the Collins field guide.
The differences are mainly in the eye colour and the markings on the second section. The Northern Blue for example has a black arrow shaped marking, whereas the common blue has more of an ace of spaces. Having looked carefully at the photos I’ve taken I reckon mine are mainly common blue. They appear to have more of the rounded dot than an arrow.
British dragonflies gives a good ID guide. Apparently one of the most typical British damselfly it is on the wing April to September. The females can be blue or a dull green. They breed forming wheels in the air over water. The eggs are laid just under water on plants. Then the nymphs live in water before climbing out onto plant stems to moult into their eventual form. But then they can be found living in grassland, gardens and woodland.
So 30 days has again developed my knowledge of another species and looking at the intricacies of a species. Please do write a comment to confirm or correct if my ID is wrong.