Black-and-chestnut Eagle
Spizaetus isidori
It is a fairly large eagle and very large raptor at 60 to 80 cm (24 to 31 in) in total length with a wingspan of 147 to 180 cm (4 ft 10 in to 5 ft 11 in). It is largest current member of the genus Spizaetus, with the smallest males somewhat larger linearly than the largest female ornate hawk-eagles. Full grown weights for black-and-chestnut eagles have been reported as 1.5 to 3.5 kg (3.3 to 7.
ID text from Wikipedia, CC BY-SA 4.0
Black Hawk-Eagle
Spizaetus tyrannus
The black hawk-eagle is 58–70 cm (23–27.5 in) long and weighs about 900 to 1,300 grams (2.0 to 2.9 pounds). It has black plumage with varying patterns on its wings and body, and white speckling in places. It has barred wings, slightly elliptical in shape, and a long, narrow tail which is rarely fanned. The four grey bars on the tail are distinctive to the black hawk-eagle, as is the white line seen slightly above the bird's eye. While flying, the broadness and shortness of the wings become apparent. While in flight, the bird's tail is typically kept closed.
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: Black-and-chestnut Eagle and Black Hawk-Eagle.