1. Bernhard Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, Hamburg, Germany
2. These authors contributed equally to this work
3. Vogeltrekstation – Dutch Centre for Avian Migration and Demography (NIOO-KNAW), Wageningen, the Netherlands
4. Department of Veterinary Pathology, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
5. Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Novel and Emerging Infectious Diseases, Greifswald-Insel Riems, Germany
6. Parc Animalier de Sainte Croix, Rhodes, France
7. Nature and Biodiversity Conservation Union (NABU), Berlin, Germany
8. German Mosquito Control Association (KABSeV), Speyer, Germany
9. University of Heidelberg, Heidelberg, Germany
10. Dutch Wildlife Health Centre, Utrecht University, Utrecht, The Netherlands
11. Erasmus MC, Department of Viroscience, WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, Rotterdam, The Netherlands
12. Nature and Biodiversity Conservation Union (NABU), Stuttgart, Germany
13. German Centre for Infection Research (DZIF), partner site Hamburg-Luebeck-Borstel, Hamburg, Germany
14. Belgian Wildlife Health Surveillance Network, Department of Infectious and Parasitic Diseases, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
15. Clinic for birds and reptiles, University Leipzig, Germany