1. Ornithological Station, Faculty of Biological Sciences, University of Wrocław, Wrocław 50-335, Poland
2. Department of Ecology, Swedish University of Agricultural Sciences, Uppsala SE-750 07, Sweden
3. SLU Swedish Species Information Centre, Swedish University of Agricultural Sciences, Uppsala SE-750 07, Sweden
4. Department of Ecology and Genetics, University of Oulu, Oulu 90014, Finland
5. Aix Marseille University, University of Avignon, Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD), Institut Méditerranéen Biodiversité & Ecologie (IMBE), Aix-en-Provence 13545, France
6. Groupe d’Etudes et de Protection des Busards (GepB), Beurville 52110, France
7. Swiss Ornithological Institute, Sempach CH-6204, Switzerland
8. Department of Zoology, Faculty of Science, Palacky University, Olomouc 771 46, Czech Republic
9. Museum of Natural History, Olomouc 771 73, Czech Republic
10. Private address, Cormost 10800, France
11. USDA Forest Service, International Institute of Tropical Forestry, Sabana Field Research Station, Luquillo 00773, PR
12. Department of Zoology, Institute of Biology, Karelian Research Center, Russian Academy of Sciences, Petrozavodsk 185910, Russia
13. Departamento de Biodiversidad y Gestión Ambiental, Universidad de León, León 24071, Spain
14. Department of Experimental Zoology and Evolutionary Biology, Faculty of Biology, University of Łódź, Łódź 90-237, Poland
15. ”Cavanilles” Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia E46080, Spain
16. Department of Natural Sciences, Tromsø University Museum, Tromsø NO-9037, Norway
17. Institute of Avian Research “Vogelwarte Helgoland”, head office Wilhelmshaven, Wilhelmshaven 26386, Germany
18. Institute of Plant and Animal Ecology, Ural Branch, Russian Academy of Sciences, Yekaterinburg 620144, Russia
19. Centre for Conservation Science, Royal Society for the Protection of Birds, Aberdeen AB10 1YP, UK
20. Department of Biological Sciences, Edward J. Meeman Biological Station, and Center for Biodiversity Research, University of Memphis, Memphis TN 38152
21. Institute of Marine Sciences - OKEANOS, University of the Azores, Horta 9901-862, Portugal
22. Private address, 64200 Biarritz, France
23. Department of Zoology & Ecology, College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
24. Division of Ecology & Evolution Research, School of Biology, The Australian National University, Canberra, ACT 2601, Australia
25. Department of Environmental Conservation, Institute of Biological Sciences, Cardinal Stefan Wyszyński University of Warsaw, Warsaw 01-938, Poland
26. Department of Biology and Center for Environmental Studies, Virginia Commonwealth University, Richmond, VA 23284
27. FitzPatrick Institute of African Ornithology, University of Cape Town, Rondebosch 7701, South Africa
28. Research Centre in Biodiversity and Genetic Resources (CIBIO) / Research Network in Biodiversity and Evolutionary Biology (InBIO), Laboratório Associado, Universidade do Porto, Vairăo 4485-601, Portugal
29. Research Centre in Biodiversity and Genetic Resources (CIBIO) / Research Network in Biodiversity and Evolutionary Biology (InBIO), Laboratório Associado, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon 1349-017, Portugal
30. BIOPOLIS Program in Genomics, Biodiversity and Land Planning, Research Centre in Biodiversity and Genetic Resources (CIBIO), Vairăo 4485-661, Portugal
31. Shamir Research Institute and Department of Geography and Environmental Studies, University of Haifa, Haifa 3498838, Israel
32. Laboratory of Ornithology, Scientific and Practical Center for Biological Resources of National Academy of Sciences of Belarus, Minsk 220072, Belarus
33. Department of Behavioural Ecology, Faculty of Biological Sciences, University of Wrocław, Wrocław 50-335, Poland
34. Biology Department, Bates College, Lewiston, ME 04240
35. Division of Organisms and Environment, School of Biosciences, Cardiff University, Cardiff CF10 3AX, UK
36. Department of Anatomy, Cellular Biology and Zoology, University of Extremadura, Badajoz E-506071, Spain
37. Laboratorio de Biología de la Conservación, Centro de Ecología Aplicada del Litoral, Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Corrientes 3400, Argentina
38. Laboratory of Molecular Zoology, National Academy of Sciences, Minsk 220072, Belarus
39. Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
40. British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 0ET, UK
41. Department of Biology, University of Turku, Turku 20014, Finland
42. Australian Antarctic Division, Department of Agriculture, Water and the Environment, 7050 Kingston TAS, Australia
43. Department of Biology, Norwegian University of Science and Technology, Trondheim 7491, Norway
44. Department of Evolutionary Ecology, Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Científicas (CSIC), Madrid 28006, Spain
45. Departament of Museum Technologies, Zoology Museum, Tomsk State University, Tomsk 634050, Russia
46. Institute of Biological Problems of the North, Far Eastern Branch, Russian Academy of Sciences, Magadan 685000, Russia
47. Department of Biology, University of Konstanz, Konstanz 78457, Germany
48. Center for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz 78457, Germany
49. Department of Collective Behavior, Max Planck Institute of Animal Behavior, Konstanz 78457, Germany
50. UK Centre for Ecology & Hydrology, Penicuik EH26 0QB, UK
51. Illinois Natural History Survey, Prairie Research Institute, University of Illinois, Urbana-Champaign, IL 61820
52. Institute of Zoology, Poznań University of Life Sciences, Poznań 60-625, Poland
53. Bioeconomy Research Team, Novia University of Applied Sciences, Raseborg FI-10600, Finland
54. Evolutionary Ecology Unit, Department of Biology, Lund University, Lund SE-223 62, Sweden
55. Hastings Reservation, University of California Berkeley, Carmel Valley, CA 93924
56. Cornell Lab of Ornithology, Cornell University, Ithaca, NY 14850
57. Private address, FI-14870 Tuulos, Finland
58. Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
59. Department of Zoology and Animal Ecology, Faculty of Biology, University of Latvia, Riga 1004, Latvia
60. Department of Biotechnology, Daugavpils University, Daugavpils 5401, Latvia
61. Department of Zoology, Institute of Ecology and Earth Sciences, University of Tartu, Tartu 51010, Estonia
62. Conservation Services Division, Ezemvelo KwaZulu-Natal Wildlife, Cascades 3202, South Africa
63. School of Life Sciences, Centre for Functional Biodiversity University of KwaZulu-Natal, Pietermaritzburg 3201, South Africa
64. Department of Vertebrate Zoology and Ecology, Tomsk State University, Tomsk 634050, Russia
65. School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK
66. Biology Department, Grand Valley State University, Allendale, MI 49401-9403
67. Ecologie Systématique Evolution, Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay, Gif-sur-Yvette 91190, France
68. Private address, 9870 Sindal, Denmark
69. Department of Zoology and Parasitology, Voronezh State University, Voronezh 394006, Russia
70. Theoretical and Computation Ecology Lab, Centre d'Estudis Acançats de Blanes (CEAB), Consejo Superior de Investigaciones Científicas, Blanes 17300, Spain
71. Environmental and Marine Biology, Åbo Akademi University, Turku 20500, Finland
72. Novia University of Applied Sciences, Raseborg FI-10600, Finland
73. Department of Biosciences, University of Helsinki, Helsinki FI-00014, Finland
74. Department of Biology and Geology, Universidad Rey Juan Carlos, Móstoles 28933, Spain
75. Hradec Králové 500 02, Czech Republic
76. Estación Biológica de Dońana - CSIC, Consejo Superior de Investigaciones Científicas (CSIC), Seville 41092, Spain
77. Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu FI-80101, Finland
78. Arctic Centre, University of Groningen, Groningen 9718CW, the Netherlands
79. Department of Animal Ecology and Systematics, Justus Liebig University, Giessen 35392, Germany
80. Department of Life Sciences, Marine and Environmental Sciences Centre (MARE), University of Coimbra, Coimbra 3000-456, Portugal
81. Private address, CH-1446 Baulmes, Switzerland
82. Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481
83. Department of Ecology and Evolution, University of Lausanne, Lausanne CH-1015, Switzerland
84. Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY 10027
85. Weetangera, Australian Capital Territory 2614, Australia
86. Division of Conservation Biology, Institute of Ecology and Evolution, University of Bern, Bern CH-3012, Switzerland
87. Departament de Vertebrats, Museu de Ciències Naturals de Barcelona, Barcelona 08003, Spain
88. Luontotutkimus Solonen Oy, Helsinki FI-00960, Finland
89. Panurus Monitoringi Inwentaryzacje Opinie Przyrodnicze, Osieczna 64-113, Poland
90. School of Biological Sciences, Lighthouse Field Station, University of Aberdeen, Cromarty IV11 8YL, UK
91. Konrad Lorenz Institute of Ethology, University of Veterinary Medicine, Vienna 1160, Austria
92. Department of Systematic Zoology and Ecology, Behavioural Ecology Group, ELTE Eötvös Loránd University, Budapest H-1117, Hungary
93. Integrative Ecology Research Group, Eötvös Loránd Research Network - Eötvös Loránd University - The Hungarian Natural History Museum, Budapest H-1117, Hungary
94. Department of Animal Ecology, Netherlands Institute of Ecology, Wageningen 6708PB, the Netherlands
95. Department of Physical Sciences, College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
96. Department of Biology, University of Kentucky, Lexington, KY 40506-0225
97. Department of Biology, Bowdoin College, Brunswick, ME 04011
98. Department of Zoology and Nature Protection, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin 20-033, Poland
99. Department of Biology, University of Saskatchewan, Saskatoon S7N 5E2, Canada
100. Institute of Nature Conservation, Polish Academy of Sciences, Kraków 31-120, Poland
101. Department of Vertebrate Zoology and Anthropology, Szczecin University, Szczecin 71-415, Poland
102. Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague 16521, Czech Republic
103. Institute for Game and Wildlife Research, IREC (CSIC-UCLM-JCCM), Ciudad Real E- 13005, Spain
104. Pyrenean Institute of Ecology, Consejo Superior de Investigaciones Científicas (CSIC), Jaca 22700, Spain