1. Neurobiology and Genetics, Theodor-Boveri Institute, Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
2. Institute of Zoology, University of Regensburg, Universitätsstraße 31, 93040 Regensburg, Germany
3. Department of Ecology, Evolution, and Behaviour, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel