1. University of Białystok Ciołkowskiego 1J Białystok15‐245Poland
2. Estonian University of Life Sciences Kreutzwaldi 5D Tartu51006Estonia
3. Eagle Conservation Committee Niepodległości 53/55 Olsztyn10‐044Poland
4. Nature Research Centre Akademijos Street 2 Vilnius08412Lithuania
5. Milvus Group – Bird and Nature Protection Association B‐dul 1 Decembrie 1918, nr. 121 Tîrgu Mureș540445Romania
6. T. Ivanauskas Zoological Museum Laisvės Avenue 106 Kaunas44253Lithuania
7. Department of Game Management and Forest Protection Poznań University of Life Sciences Wojska Polskiego 71d Poznań60‐625Poland
8. Polish Society for Bird Protection Ciepła 17 Białystok15‐471Poland
9. Magurski National Park Krempna 59 Krempna38 – 232Poland
10. Bükk National Park Directorate Sánc u. 6 Eger3304Hungary
11. Madárvilág Nonprofit Ltd. Sztaravodai út 52 Szentendre2000Hungary
12. Eagle Club Kanepi Põlvamaa63406Estonia
13. Rzeczna 17 Żywocice47‐300Poland
14. Balaton‐felvidéki National Park Directorate Kossuth u. 16 Csopak8229Hungary
15. Lubelskie Ornithological Society ul. Pogodna 34/11 Lublin20‐337Poland