1. Danube Research Institute, MTA Centre for Ecological Research, Budapest, Hungary;
2. Evolutionary Systems Research Group, MTA Centre for Ecological Research, Tihany, Hungary;
3. Environmental Optics Laboratory, Department of Biological Physics, ELTE Eötvös Loránd University, Budapest, Hungary;
4. Hungarian Natural History Museum, Department of Zoology, Bird Collection, Budapest, Hungary;
5. Group for Methodology in Biology Teaching, Biological Institute, Eötvös University, Budapest, Hungary