I don't see these often, but you can't miss them when they are around.
It is a moth called six-spot burnet (Zygaena filipendulae), sint-jansvlinder in Dutch:
Olympus Stylus 1s, 300mm, ISO125, f5.6, 1/500s
Olympus Stylus 1s, 300mm, ISO125, f5.6, 1/500s
Thanks for watching!