Beautiful Demoiselle
![Beautiful Demoiselle](https://amazon.clikpic.com/paulwheeler/images/2013-07-08DSC_5351_edit-resized_1.jpg)
Female Beautiful Demoiselle (Calopteryx virgo) is perfectly named :)
Mainly found along streams and rivers, particularly those with sand or gravel bottoms. They are coloured differently to the males (photo in the comments), which are a more blue/green and have stunning dark blue wings.