Brilliant emerald

Somatochlora metallica

The brilliant emerald, ''Somatochlora metallica'', is a middle-sized species of dragonfly. It is the largest and greenest of the ''Somatochlora'' species; 50–55 millimetres long.

''S. metallica'' is found across most of northern Eurasia where it is the commonest of its genus. In Great Britain, it is locally common in south east England and has a very restricted population in Scotland.