Eastern slope of Andes of Peru in San Martín, La Libertad, Amazonas (Kuelap), and Huánuco (east of R Huallaga near Panao, and west to Cordillera Carpish).
 
Population
Estimated population is unknown (2010).
Pardusco (Nephelornis oneilli) [XC812298]
by id from Huicungo, Mariscal C\u00e1ceres Province, San Martin, Peru (song)
Pardusco (Nephelornis oneilli) [XC296814]
by Ross Gallardy from Hu\u00e1nuco: Bosque Unchog, Peru (call)
Subspecies
No subspecies.
Taxonomic affinities initially unclear, and had been suggested as being closely related to New World warblers (Parulidae). However, investigations of cytochrome b sequence data indicate that it is related to a clade of mostly Andean tanagers in genera Hemispingus, Cnemoscopus, Pyrrhocoma, Thlypopsis and Cypsnagra.