 As suggested by its name, it is found widely – but often in low densities – throughout humid lowland forests of the Amazon Basin, with the notable exception of most of the Guiana Shield.It is sometimes split into two species, the western olive oropendola ("P. yuracares") and the eastern Pará oropendola ("P. bifasciatus"), but the subspecies "P. y. neivae" is widely recognized as a hybrid swarm, and the vast majority of authorities consider them a single species.The sexes of this icterid are very different in size