Changes

The call is sometimes "bark-like", similar to a dog, while at other times it's a lighter, yet shrill whistle similar to other eagles.<ref>https://xeno-canto.org/species/aquila-heliaca</ref>

The call is sometimes "bark-like", similar to a dog, while at other times it's a lighter, yet shrill whistle similar to other eagles.<ref>https://xeno-canto.org/species/aquila-heliaca</ref>

===Diet===

===Diet===

==Threats==

==Threats==

The eastern imperial eagle, like many birds of prey, was blamed for livestock losses and hence suffered persecution from man starting in the 17th century<ref>Maarten Bijleveld, "The systematic persecution: A review of historical and more recent examples of the destruction of birds of prey in Europe"; from ''Birds of Prey in Europe'', Macmillan Education UK, 1974 (pages 1-43) https://link.springer.com/chapter/10.1007/978-1-349-02393-6_1</ref>. It thus experienced a sharp decline, exacerbated by the destruction of nesting trees, the disappearance of its prey, and either deliberate poisoning intended for the eagle itself, or involuntary poisoning via traps intended for mammalian predators (wolves, foxes, etc).

Despite the Biblical reference, the eastern imperial eagle, like many birds of prey, was blamed for livestock losses and hence suffered persecution from man starting in the 17th century<ref>Maarten Bijleveld, "The systematic persecution: A review of historical and more recent examples of the destruction of birds of prey in Europe"; from ''Birds of Prey in Europe'', Macmillan Education UK, 1974 (pages 1-43) https://link.springer.com/chapter/10.1007/978-1-349-02393-6_1</ref>. It thus experienced a sharp decline, exacerbated by the destruction of nesting trees, the disappearance of its prey, and either deliberate poisoning intended for the eagle itself, or involuntary poisoning via traps intended for mammalian predators (wolves, foxes, etc).

Numerous conservation efforts have helped revive the species. It was notably classified as vulnerable by the IUCN in 1994<ref>https://app.birda.org/species-guide/8320/Eastern_Imperial_Eagle</ref>. While it was estimated that between 363 and 604 pairs remained in Europe in 1996<ref>Heredia, B. (1996). ''International action plan for the Imperial Eagle (Aquila heliaca). Globally Threatened Birds of Europe: Action Plans''. Council of Europe Publishing[https://www.researchgate.net/publication/239547357_INTERNATIONAL_ACTION_PLAN_FOR_THE_IMPERIAL_EAGLE_Aquila_heliaca]</ref>, this number had risen to between 1,800 and 2,200 in 2010<ref>Demerdzhiev, D., Horváth, M., Kovács, A., Stoychev, S., & Karyakin, I. (2011). Status and population trend of the eastern imperial eagle (Aquila heliaca) in Europe in the period 2000–2010. Acta zoologica Bulgarica Supplementum (pages 3, 5-14)[https://www.researchgate.net/publication/261726710_Status_and_Population_Trend_of_the_Eastern_Imperial_Eagle_Aquila_heliaca_in_Europe_in_the_Period_2000-2010]</ref>.

Numerous conservation efforts have helped revive the species. It was notably classified as vulnerable by the IUCN in 1994<ref>https://app.birda.org/species-guide/8320/Eastern_Imperial_Eagle</ref>. While it was estimated that between 363 and 604 pairs remained in Europe in 1996<ref>Heredia, B. (1996). ''International action plan for the Imperial Eagle (Aquila heliaca). Globally Threatened Birds of Europe: Action Plans''. Council of Europe Publishing[https://www.researchgate.net/publication/239547357_INTERNATIONAL_ACTION_PLAN_FOR_THE_IMPERIAL_EAGLE_Aquila_heliaca]</ref>, this number had risen to between 1,800 and 2,200 in 2010<ref>Demerdzhiev, D., Horváth, M., Kovács, A., Stoychev, S., & Karyakin, I. (2011). Status and population trend of the eastern imperial eagle (Aquila heliaca) in Europe in the period 2000–2010. Acta zoologica Bulgarica Supplementum (pages 3, 5-14)[https://www.researchgate.net/publication/261726710_Status_and_Population_Trend_of_the_Eastern_Imperial_Eagle_Aquila_heliaca_in_Europe_in_the_Period_2000-2010]</ref>.