. . . "Passeriformes" . . "Animalia" . . "Russet-backed Oropendola" . "Chordata" . "Icteridae" . "Psarocolius angustifrons (Spix 1824)" . . "Psarocolius" . . "Psarocolius angustifrons" . . . "(Spix 1824)" . "Aves" . . . . . . .