Dimitar Atanasov Demerdzhiev. Bulgarian Society for the Protection of Birds/BirdLife Bulgaria. National Museum of Natural History, Bulgarian Academy of Sciences, Sofia, Bulgaria. Raptor conservation expert. PhD, 2011. Biology, ecology, and conservation of the imperial eagle in Bulgaria. National Museum of Natural History/Bulgarian Academy of Science. Twenty-three years of work for the conservation of birds of prey. Scientific interests: bird ecology and evolution, behavioral ecology, conservation biology.