Common blue damselfly males seem to be the damselflies most likely to be seen around here (the females are much less conspicuous).
These were near various different bodies of water in the West Midlands.
There are usually several to be spotted in the places where they are found. The first time I saw them at the Compton Park pool this year, there were at least three hundred, probably newly emerged, as the numbers were in the tens by the following day.