The silver-studded blue is widespread in Europe and often common,
though in England it is restricted to heathland in the south and west.
It is one of three species that have silver studs on the underside
hindwing - the others being the idas blue and Reverdin's blue.
Reverdin's is rather rarer but idas is also widespread and it is not
always easy to tell these species apart. Generally, however, the male
silver-studded blue has broader dark borders on the uppersides than the
others, setting off the pure white fringes in a very characteristic