13 May 2011 - Cardinal beetle / Roodkopvuurkever (Pyrochroa serraticornis).
The insect is named Roodkopvuurkever in Dutch. Vuurhaantje is probably an unofficial name used at some places in The Netherlands. It's a Cardinal beetle. Scientific name Pyrochroa serraticornis. In English not to be confused with the other beetle that is named Cardinal beetle. Pyrochroa coccinea has a black head and is a bit more common than the red headed version I observed. There was a whole bunch of these beetles where I was strolling through the countryside near Leiden in The Netherlands. This is the season or month to spot Cardinal beetles!