This charming tiny butterfly is very common in the Alps, but less so in the UK where I have to travel distances to either East or West coast to see it. As it's name suggests it is small, but some can approach the size of the Common Blue!

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The male butterfly shows varying amounts of blue upper-side scaling and the females though lacking blue scales, can sport a very attractive blue iridescent sheen. 

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It was a long time before I found it in the UK, and I still enjoy achieving a good photograph of this species.