I found this tiny bright red beetle on the leaf of the white Snake's head Fritillary yeasterday evening & had to look it up:- The name cardinal beetle typically refers to three different species of beetles. The red-headed or 'common' cardinal beetle (Pyrochroa serraticornis) is a red to orange beetle with, as the name suggests, a red head. It is about 20 millimetres (0.79 in) long, and is found throughout Britain.[1] The rarer black-headed cardinal beetle (P. coccinea), similarly found at sites across Britain, is larger and a deeper blood red. cardinal beetles are usually found on tree bark and flowers and feed on flying insects. I could find no reference to it being found in Ireland but there it was for me to find in my Dublin Garden! Susan