Affiliation: | 1. Max Planck Institute for Ornithology, Vogelwarte Radolfzell, Radolfzell, Germany;2. Department of Animal Ecology & Systematics, Justus Liebig University Giessen, Giessen, Germany;3. Department of Integrative Biology and Evolution, Konrad Lorenz Institute for Ethology, University of Veterinary Medicine Vienna, Vienna, Austria;4. Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland;5. Department of Zoology, University of Venda, Thohoyandou, South Africa |