ChalkHill Blue Polyommatus coridon

Formerly Lysandra coridon

Restricted to a few sites in the Mendips and the Poldens where Horseshoe Vetch grows. Usually flying mainly in July and August, males are shiny silvery blue, quite unmistakable, but females are a little like Brown Argus and some female Common Blues but a bit larger and the orange edging on the forewing is less pronounced.

 

Images L-R: male; female; undeside

Flight Period: June - September