Blue butterfly ID - NE Greece (1 Viewer)

[sav]

Seen at Lake Prespa, April 2017.

 

[RafaelMatias]

You've got 2 species there. The larger ones are Green-underside Blues. The smaller ones are one of the Cupido species, possibly Small Blue but I cannot discard Osiris Blue without seeing their upperside. Would you have any more pics of those?

EDIT: on a 2nd look, the smaller might be Provençal Short-tailed Blues, due to the (almost invisible) marginal pattern on the hidwings, and a suggestion of a tail, but clearer images would help.

 

[sav]

Thanks for your help. Sorry, this is the only image (taken by someone else).