The olive oropendola (Psarocolius bifasciatus) is the largest member of the icterid family and rivals the Amazonian umbrellabird as the largest passerine bird in South America. It is sometimes placed in the genus Gymnostinops instead of Psarocolius. 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.