The Crested Oropendola, Psarocolius decumanus, is a New World tropical icterid bird. It is a resident breeder in lowland South America east of the Andes, from Panama and Colombia south to northern Argentina, as well as on Trinidad and Tobago. If the genus Gymnostinax for the Montezuma Oropendola and its closest relatives were considered valid, this species would probably belong in that genus (Price & Lanyon 2002).
It is a common bird, seen alone or in small flocks foraging in trees for large insects, fruit and some nectar. The male is 46 cm long and weighs 300g; the smaller female is 37 cm long and weighs 180g.
The plumage of the Crested Oropendola has a musty smell due to the oil from the preen gland.