A first detailed description of building a new nest and new data on the courtship behaviour of golden eagle
Angelov, Ivaylo
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
The first documentation of a juvenile eastern imperial eagle (Aquila heliaca) with an unstreaked body
Angelov, Ivaylo