Authors
Tadeusz Mizera
Zoology Deptartment, Poznań University of Live Sciences, Poznań, Poland
Grzegorz Maciorowski
Department of Game Management and Forest Protection, Poznań University of Life Sciences, Poznań, Poland
Dana Karelus
Department of Biology, Sul Ross University, USA
Christiane Meyburg
World Working Group on Birds of Prey, Paris, France
Michael J. McGrady
International Avian Research, Austria