1. Institute of Ecology and Evolution University of Bern Bern Switzerland
2. Natural History Museum Bern Switzerland
3. Schweizerische Vogelwarte Sempach Switzerland
4. State Key Laboratory of Biocontrol College of Ecology School of Life Science Sun Yat‐sen University Guangzhou China
5. School of Biological Sciences—Organisms and the Environment University of East Anglia Norwich UK
6. Department of Organismal Biology – Systematic Biology, Evolutionary Biology Centre (EBC) Uppsala University Uppsala Sweden
7. National University of Mongolia and Mongolian Ornithological Society Ulaanbaatar Mongolia