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Spizaetus isidori

Black-and-chestnut Eagle

  • Order: Accipitriformes
  • Family: Accipitridae
  • Monotypic


Spizaetus isidori

Chical Road, Carchi, Ecuador; 10 October 2014 © Roger Ahlman

The Black-and-chestnut Eagle is a very large raptor, closely allied with the similar  hawk-eagles (Spizaetus) of the lowlands. This eagle is endemic to the humid montane forests of the Andes from Venezuela to Bolivia. It is a very dark species, being primarily black with a deep chestnut breast, tarsi and vent. At lower elevations, it may narrowly overlap with the lowland hawk-eagles, where it would be most easily confused with Black Hawk-Eagle, but note its chestnut underparts, larger size and distinctive tail pattern. The Black-and-chestnut Eagle feeds on large birds, such as cracids, and on arboreal mammals, ranging in size from squirrels to monkeys, especially Woolly Monkeys (Lagothrix).

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Recommended Citation

. 2010. Black-and-chestnut Eagle (Spizaetus isidori), Neotropical Birds Online (T. S. Schulenberg, Editor). Ithaca: Cornell Lab of Ornithology; retrieved from Neotropical Birds Online:

This map provided by Robert S. Ridgely.

  • Migration/Movement:Resident (nonmigratory)
  • Primary Habitat:Montane evergreen forest
  • Foraging Strata:Canopy
  • Foraging Behavior:---
  • Diet:Birds
  • Sociality:
  • Mating System:
  • Nest Form:
  • Clutch: -
  • IUCN Status:Near Threatened