1. Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (IMBE); Aix Marseille Université; CNRS; IRD; Avignon Université; Technopôle Arbois-Méditerranée; Bât. Villemin - BP 80 F-13545 Aix-en-Provence Cedex 04 France
2. United Nations Environment Programme World Conservation Monitoring Centre; 219 Huntingdon Road Cambridge CB3 0DL UK
3. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig; Deutscher Platz 5e 04103 Leipzig Germany
4. Institute of Biology; Martin Luther University Halle Wittenberg; Am Kirchtor 1 06108 Halle (Saale) Germany
5. European Bird Census Council (EBCC) & Forest Science Centre of Catalonia (CEMFOR-CTFC); 25280 Solsona Spain
6. Center for Ecological Research and Forestry Applications (CREAF); 08193 Bellaterra Spain
7. Department of Life Sciences; The Natural History Museum; London SW7 5BD UK
8. School of Biology; Faculty of Biological Sciences; University of Leeds; Leeds LS2 9JT UK
9. Department of River Ecology and Conservation; Senckenberg Research Institute and Natural History Museum Frankfurt; Clamecystrasse 12 63571 Gelnhausen Germany
10. Biodiversity and Climate Research Centre (BiK-F); Senckenberganlage 25 60325 Frankfurt am Main Germany
11. Department of Conservation Biology; Helmholtz Centre for Environmental Research - UFZ; Permoserstrasse 15 04318 Leipzig Germany
12. Museum für Naturkunde; Leibniz Institute for Evolution and Biodiversity Science; Invalidenstr. 43 10115 Berlin Germany
13. Council for Scientific and Industrial Research (CSIR); Natural Resources and Environment; PO Box 395 Pretoria 0001 South Africa
14. Centre for Wildlife Management; University of Pretoria; Pretoria 0002 South Africa