First-time use of metal construction for mounting artificial nests on trees for Saker Falcons (Falco cherrug) in Bulgaria
Rusko Petrov, Rosie Costain, Yana Andonova, Ivaylo Klisurov
Recent breeding records of Saker Falcons (Falco cherrug) in Bulgaria
Volen Arkumarev, Ivaylo Klisurov, Dimitar Demerdzhiev, Rusko Petrov, Anton Stamenov, Yana Andonova, Dimitar Gradinarov, Andrew Dixon