Editing Eastern imperial eagle (section)

===Vocalizations===
[[File:Kaiseradler Aquila heliaca 4 amk.jpg|thumb|A probable older subadult eastern imperial eagle in a captive [[falconry]] centre.]]
The eastern imperial eagle is quite vocal on their breeding ground but tends to be silent or nearly so elsewhere. The main call of the species is a deep, harsh bark ''owk owk'', ''gok gok'' or ''kraw-kraw''. The call tends to be repeated rapidly up to 8-10 times. Their call is perceptibly deeper and harsher than that of the [[golden eagle]], somewhat incongruously also being more resonant and commanding. Sometimes when extending to a prolonged version, its call is sometimes considered reminiscent of the croak of a large [[frog]].<ref name= Ferguson-Lees/><ref name= Gould>Gould, J., & Rutgers, A. (1966). ''Birds of Europe (Vol. 1)''. Methuen.</ref><ref>Schulze, A., & Dingler, K. H. (2003). ''Die Vogelstimmen Europas, Nordafrikas und Vorderasiens''.</ref> The eastern imperial eagle most frequently calls during their aerial displays. In extreme cases, the call may be repeated up to 13 times during an aerial display. Furthermore, they may repeat the call from a perch. Females may also call when a male arrives with prey. Alarm calls recorded for the species include a soft ''ko-gok, wk wk wk'', uttered in response to a distant intruder, a closer approach also may cause a harder ''gek'' call by the mother. A rising and falling trill has been additionally recorded in captivity is also probably an alarm call.<ref name= Ferguson-Lees/><ref>Boswall, J. (1969). ''New Palearctic bird sound recordings during 1966-67''. Diemer & Reynolds.</ref>