I thought a shiny green beetle with red ‘buttocks’ would be easy to identify – I should’ve known better. It seems the Malachite beetle (Malachius bipustulatus), named after the bright green mineral its colour resembles, can be mistaken for a similar beetle Cordylepherus viridis, though the thorax and head shapes are a little different. Looking at those features, and checking the Welsh records for both beetles, I’m fairly sure my find is a Malachite beetle but I’ll update this post if I’m proved wrong.