1. Institute for Environmental Studies, Faculty of Science, Charles University, Prague, Czechia
2. Department of Zoology, Faculty of Science, Palacky University in Olomouc, Olomouc, Czechia
3. Czech Society for Ornithology, Prague, Czechia
4. European Bird Census Council, Prague, Czechia
5. Department of Physical Geography and Geoecology, Faculty of Science, Charles University, Prague, Czechia
6. Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czechia