1. Edward Grey Institute Department of Zoology University of Oxford Oxford UK
2. Cornell Lab of Ornithology Cornell University Ithaca NY USA
3. British Trust for Ornithology Thetford UK
4. University of Exeter Penryn UK
5. Max Planck Institute for Evolutionary Biology MPRG Behavioural Genomics Plön Germany
6. Institute of Avian Research “Vogelwarte Helgoland” Wilhelmshaven Germany