But just for fun, would anyone like to try and identify it from its shadow and the glint in its eye (plus what you can see of its wings)? I'll be very impressed if anyone gets it right, but I think there is enough information!!
It was flying at about 1500m in the Alps and basking on an exposed, sunny rock before the car came by.

If no one answers I'll just post the identity anyway in a few days.
Guy