This video from France shows an European nightjar.
At least one couple, but it is expected two or three couples of nightjars bred this year on Texel. One couple was at a spot not far from a path and regularly got into danger because dog walkers did not keep their dogs on leashes. Despite that dogs must be leashed during the breeding season, not everyone acts according to that rule. Fortunately, for this couple things ended well, both the young ones fledged.