1. Department of Ethology, Eötvös Loránd University, Pázmány P. s 1c, 6th Floor , Budapest 1117, Hungary
2. Messerli Research Institute, University of Veterinary Medicine , Vienna, Austria
3. ELTE NAP, Comparative Ethology Research Group , Budapest, Hungary
4. MTA-ELTE, Comparative Ethology Research Group , Budapest, Hungary