Experiments carried out by the ethologist Nikolaas Tinbergen supported the hypothesis that 'a wasp learns the location of her nest by visual cues only'. The method he followed was as follows: the entrance of the wasp's nest on the ground was surrounded by cones of a pine tree in a circular manner. These cones served as movable visual cues. When the wasp left her nest for foraging, the pine cones were moved to a diffe