Survival rate and mortality of juvenile and immature eastern imperial eagles (Aquila heliaca) from Bulgaria studied by satellite telemetry
Stoychev, Stoycho, Demerdzhiev, Dimitar, Spasov, Svetoslav, Dobrev, Dobromir, Meyburg, Bernd-Ulrich
Distribution, abundance, breeding parameters, threats and prey preferences of the eastern imperial eagle (Aquila heliaca) in European Turkey
Demerdzhiev, Dimitar, Dobrev, Dobromir, Stoychev, Stoycho, Terziev, Nikolay, Spasov, Svetoslav, Boev, Zlatozar, Stoychev, Stoycho
The Goosander Mergus merganser range expansion on the Balkan Peninsula and a new breeding population in Bulgaria
Dobrev, Dobromir, Borisov, Borislav, Dobrev, Vladimir, Arkumarev, Volen, Angelov, Ivaylo, Stoychev, Stoycho
Conservation measures undertaken to improve the population status of eastern imperial eagle (Aquila heliaca) in Bulgaria
Demerdzhiev, Dimitar, Stoychev, Stoycho, Dobrev, Dobromir, Spasov, Svetoslav, Terziev, Nikolay
Seasonal and age-specific dynamics of the Griffon Vulture’s home range and movements in the Eastern Rhodopes
Arkumarev, Volen, Dobrev, Dobromir, Stamenov, Anton, Delchev, Atanas, Stoychev, Stoycho
Main mortality factors for the Eastern Imperial Eagle (Aquila heliaca Savigny, 1809) in Bulgaria
Lazarova, Ivanka, Dobrev, Dobromir, Gradev, Gradimir, Petrov, Rusko, Stoychev, Stoycho, Klisurov, Ivaylo, Demerdzhiev, Dimitar