Eastern Imperial Eagle
Aquila heliaca
The eastern imperial eagle is a large eagle, but usually falls near the average size of the large-bodied genus Aquila. Adult total length can range from 68 to 90 cm (27 to 35 in) with a typical wingspan of 1.76 to 2.2 m (5 ft 9 in to 7 ft 3 in). The average wingspan of a small sample showed males to average 1.95 m (6 ft 5 in) while a small sample of females averaged 2.07 m (6 ft 9 in). Although otherwise outwardly similar, the species displays reverse sexual dimorphism as do most birds of prey, in which males are usually smaller than the females. Voice: 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.
ID text from Wikipedia, CC BY-SA 4.0
Verreaux's Eagle
Aquila verreauxii
Verreaux's eagle is a very large eagle. It measures 75 to 96 cm (30 to 38 in) long from the bill to the tip of the tail, making it the sixth longest eagle in the world. Males can weigh 3 to 4.2 kg (6.6 to 9.3 lb) and the larger females weigh 3.1 to 7 kg (6.8 to 15.4 lb). The average weight is approximately 4.19 kg (9.2 lb), based on the weights of 21 eagles of both sexes. Other reported mean body mass measurements of Verreaux's eagles were lower however, with seven unsexed birds averaging 3.32 kg (7.3 lb), while four unsexed eagles in an additional study averaged 3.72 kg (8.2 lb). Voice: This species is largely silent, though is arguably a stronger vocalist than its close cousin, the golden eagle. Chicking and chirruping sounds like that of a young turkey or francolin, pyuck, have been heard in various contexts, such as pairs being reunited. More striking sounds are loud, ringing whaeee-whaeee, heeeee-oh or keeooo-keeooo calls used as contact calls or during intruder chases.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Eastern Imperial Eagle and Verreaux's Eagle.