Adonis Blue?

I have trawled through the fifty-eight pages of my butterfly book that deal with Blues and I think this is an Adonis Blue. That said a lot of them are not even Blue.....
I loved the six pages of "Anomalous Blues" - the anomaly being that they are brown rather than blue. Some great names. Have you ever seen a Forster's Furry Blue. Probably not unless you have been to a small part of Northern Spain. Visit Northern Greece to see a False Eros Blue - the possibilities are endless for chasing the Blues.
And I thought warblers were hard!