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


Distribution map:


Chalk Hill Blue