Liancalus virens

Length 7 or 8 mm.  This colourful species is the largest of the dolichopodid or long legged flies in north western Europe.

It lives amongst the mosses, liverworts and algae growing under bridges and beside waterfalls and fast running water.

All year round.

Scattered records from across most of Britain often with a western or coastal bias.

Status in Leicestershire and Rutland not known.