Common Blue Damselfly are exactly that at Venus Pool and here are a few representative images, starting with the male.....
Females of all the blue damselflies are trickier to separate as they have much more black on the abdomen but the broad blue antehumeral stripes on the thorax, as in the male (other colour forms are possible!) give this one away.
Despite their small size, they are fearsome predators as this small bug will testify!
Off to Whixall Moss next for something a bit more special.....
