- Spizaetus isidori
The adult has mostly black upperside and head, chestnut underside, and tail with proximal part gray.
The juvenile is much paler, gradually becoming darker with age. Legs are long.
Mountains with humid forest in subtropical zone.
Not well recorded. Their diet is thought to be large birds and tree dwelling mammals, such as squirrels.
- Clements, JF. 2008. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2008. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.
- BirdForum Opus contributors. (2021) Black-and-chestnut Eagle. In: BirdForum, the forum for wild birds and birding. Retrieved 10 May 2021 from https://www.birdforum.net/wiki/Black-and-chestnut_Eagle
#Handbook of the Birds of the World Alive (retrieved July 2014)