The
Oropendolas comprise two genera of South and Central American passerine birds in the New World blackbird family. All the oropendolas are large birds with pointed bills, and long tails which are always at least partially bright yellow.
The legs are dark, but the bill is usually a strikingly contrasting feature, either pale yellow, or red-tipped with a green or black base. In several species there is also a blue or pink bare cheek patch.
Oropendolas are birds associated with forests or, for a few species, more open woodland. They are colonial breeders, with several long woven basket nests in a tree, each hanging from the end of a branch.
These gregarious birds eat large insects and fruit. They are very vocal, producing a wide range of songs, sometimes including mimicry.

The species in the genus Psarocolius are:
Black Oropendola, Psarocolius guatimozinus
Chestnut-headed Oropendola, Psarocolius wagleri
Russet-backed Oropendola, Psarocolius angustifrons
Dusky-green Oropendola, Psarocolius atrovirens
Green Oropendola, Psarocolius viridis
Crested Oropendola, Psarocolius decumanus

Four somewhat different species were formerly separated in the genus Gymnostinops.
Montezuma Oropendola, Psarocolius montezuma
Baudo Oropendola, Psarocolius cassini
Amazonian Oropendola, Psarocolius bifasciatus
Pará Oropendola, Psarocolius (bifasciatus) bifasciatus
Olive Oropendola, Psarocolius (bifasciatus) yuracares