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
Ornate Hawk-Eagle
Spizaetus ornatus
This is a medium to large-sized species of raptor, but small for an eagle. In the ornate hawk-eagle, the sexes are similar in appearance and overlap in size, but like most birds of prey, do show reverse sexual dimorphism, in which females outsize males to the contrary of most nonraptorial birds. The biggest female ornate hawk-eagles are 13% larger than biggest males, with an average of about 8% greater in nominate race. In Central America, in extreme cases, the largest females are as much as 50% heavier than the smallest males. Voice: The main call known for the ornate hawk-eagle is a series of loud piping whistles. It is emitted by the soaring bird, usually male, and is often transcribed as whi whee-whee-wheep, the whee repeated anywhere from 2 to 9 times. Numerous variations are known are given in terms of transcription but most sources describe in roughly similar ways.
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 Ornate Hawk-Eagle.