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) [XC61030]
by David Monroy Rengifo from San Pedro, Manu Road, Cusco, Peru (call?)
Black-and-chestnut Eagle (Spizaetus isidori) [XC780744]
by Juan Camilo Mu\u00f1oz from Atahualpa (Habaspamba) (near Pataqu\u00ed), Distrito Metropolitano de Quito, Pichincha, Ecuador (alarm call)
Subspecies
Oroaetus isidori (Sibley and Monroe 1990, 1993) is transfered to the genus Spizaetus following SACC (2006).