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After making your picture darker it becomes clear it's a Clytocerus, but not one of the four species from the Netherlands.
It is very well possible that there are useful characteristics in leg colouring, but I have not (yet) studied that. In fact no one studies characteristics which are useful for identifying them from pictures, except me. The Spanish pictures you foudn are validated by me, as far as possible. There is very much work to do here!