Russet-backed oropendola

The russet-backed oropendola (Psarocolius angustifrons) is a species of bird in the family Icteridae. It is found in wooded habitats in the highlands of the northern and central Andes and the Venezuelan Coastal Range, and in lowlands of the western Amazon. It is generally common and widespread. Males are larger than females, but otherwise the sexes are similar. Its plumage is mainly olive and brown, and the outer rectrices are contrastingly yellow. The lowland nominate subspecies has a black bill, while the highland subspecies all have pale bills. These have been regarded as separate species, but as they hybridize freely, all major authorities now regard them as a single species.

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  Black billed subspecies in the lowlands of eastern Ecuador
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  Pair of P. a. salmoni, grooming, Colombia

Russet-backed oropendola
In Colombia Song of Russet-backed oropendola
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Icteridae
Genus:	Psarocolius
Species:	P. angustifrons
Binomial name
Psarocolius angustifrons (Spix, 1824)
Range of russet-backed oropendola (in green)