Oropendolas are a genus of passerine birds, Psarocolius, in the New World blackbird family Icteridae which are native to Central and South America.

They were once divided into two or three separate genera, but this is no longer the case. All oropendolas are large birds with pointed bills and long tails that are at least partly bright yellow. Males are typically larger than females. The plumage is typically chestnut, dark brown or black, although the green oropendola and olive oropendola have, as their names imply, an olive coloration to the head, breast and upper back. 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. These social birds feed on large insects and fruit. They are highly vocal and produce a wide variety of songs and calls, sometimes including mimicry. They are colonial breeders, with several long woven basket nests in a tree, each hanging from the end of a branch.

Taxonomy: The genus Psarocolius was introduced in 1837 by the German naturalist Johann Georg Wagler. The genus name combines the Ancient Greek ψαρ/psar, ψαρος/psaros meaning "starling" with κολοιος/koloios "jackdaw". Wagler did not specify a type species but in 1855 the English zoologist George Gray designated the type as Oriolus cristatus Gmelin, 1788. This a junior synonym of Xanthornus decumanus Pallas, 1769, the crested oropendola.

The genus contains nine species:

Image	Common name	Scientific name	Distribution
	Russet-backed oropendola	Psarocolius angustifrons
	Dusky-green oropendola	Psarocolius atrovirens
	Green oropendola	Psarocolius viridis
	Crested oropendola	Psarocolius decumanus
	Chestnut-headed oropendola	Psarocolius wagleri
	Montezuma oropendola	Psarocolius montezuma
	Black oropendola	Psarocolius guatimozinus
	Baudo oropendola	Psarocolius cassini
	Olive oropendola	Psarocolius bifasciatus

In 2002 Jordan Price and Scott Lanyon studied the phylogeny of the oropendolas using mtDNA cytochrome b and NADH dehydrogenase subunit 2 sequences. As can be observed from morphology, the band-tailed (Ocyalus latirostris) and the casqued oropendolas (Psarocolius oseryi) are the most distinct species. Genetically, they appear to be more closely related to the caciques, and both species would be classified in the genus Ocyalus. Furthermore, the casqued oropendola could be separated into Clypicterus, forming what would then become a monotypic genus (like Ocyalus).

Below is a cladogram based on the 2002 phylogenetic analysis´ maximum likelihood phylogenetic tree: