1. Department of Neuroethology/Sensory Ecology; Institute for Zoology, University of Bonn; Bonn Germany
2. Faculty of Biology/Cognitive Interaction Technology; AG Active Sensing, Bielefeld University; 33615 Bielefeld Germany
3. Unité de Neuroscience, Information et Complexité, Centre National de la Recherche Scientifique (UNIC, CNRS-UPR 3293); 91190 Gif-sur-Yvette France