Spanish Imperial Eagle
Aquila adalberti
This is a large raptor and quite large eagle, broadly similar in size to its cousin, the eastern imperial eagle, which is found in a considerably different distributional range. Compared to sympatric largish booted eagles, it is somewhat smaller than the golden eagle and somewhat larger than Bonelli's eagle. Spanish imperial eagles can weigh from 2.5 to 4.8 kg (5.5 to 10.6 lb). The average weight of males in a sample of 10 was 3.19 kg (7.0 lb) while that of 17 females was found to be 3.43 kg (7.6 lb). Meanwhile, another sample of 10 unsexed adults weighed an average of 3.93 kg (8.7 lb).
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
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Spanish Imperial Eagle and Verreaux's Eagle.