The Common Darter (Sympetrum striolatum) is a dragonfly of the family Libellulidae native to Eurasia. It is one of the most common dragonflies in Europe, occurring in a wide variety of water bodies.wikipedia
I was unsure about the species, the only diagnostic feature I found is in en.wikipedia.org/wiki/Common_Darter "In all cases the legs have a cream or yellow stripe on a black background"Actually in my photos it appears more green, but I observed some male in the same area and they have the same strip.If someone have some doubt or criticism I'll be glad to know about it.Tuscany, Italy