1. Department of Migration and Immuno-Ecology, Max Planck Institute for Ornithology, 78315 Radolfzell, Germany.
2. Department of Biology, University of Konstanz, 78457 Konstanz, Germany.
3. Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas, 41092 Seville, Spain.
4. Vogelschutzwarte Storchenhof Loburg e.V., 39279 Loburg, Germany.
5. Tyumen State University, 625003 Tyumen, Russia.
6. Acopian Center for the Environment, American University of Armenia, Yerevan 0019, Armenia.
7. Evros Delta Management Authority, Alexandroupoli 68100, Greece.
8. Faculty of Biological Sciences, University of Zielona Góra, Institute of Biotechnology and Environment Protection, 65-516 Zielona Góra, Poland.
9. Association Les Amis des Oiseaux–BirdLife Tunisia, Aryanah 2080, Tunisia.
10. Movement Ecology Laboratory, Department of Ecology, Evolution and Behavior, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
11. School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Wits 2050 Johannesburg, South Africa.