Other Scientific Names
Oroaetus isidori [Collar and Andrew (1988)], Oroaetus isidori [Collar et al. (1994)], Oroaetus isidori [BirdLife International (2004)], Oroaetus isidori [Sibley and Monroe (1990, 1993)], Oroaetus isidori [Stotz et al. (1996)]
Argentina (B), Bolivia (B), Colombia (B), Ecuador (B), Peru (B), Venezuela (B).
Coastal ranges of north-western Venezuela (Carabobo) and north-eastern Colombia (Santa Marta Mts), and southern on subtropical slopes of Andes from Venezuela (Mérida) through Colombia, Ecuador and Peru to west-central Bolivia and (formerly?) north-western Argentina.
 
Population
Estimated population is 1,000 - 2,499 (2010) and decreasing.
Black-and-chestnut Eagle (Spizaetus isidori) [XC639768]
by Peter Boesman from Jard\u00edn, Antioquia, Colombia (flight call)
Black-and-chestnut Eagle (Spizaetus isidori) [XC260351]
by Mitch Lysinger from Napo: 'Caba\u00f1as San Isidro', 1-2 km SW Cosanga, Ecuador (call, several calls)
Subspecies
Oroaetus isidori (Sibley and Monroe 1990, 1993) is transfered to the genus Spizaetus following SACC (2006).