This taxon is Not Recognised as a species by BirdLife International.
Phibalura flavirostris (Sibley and Monroe 1990, 1993) has been split into P. flavirostris and P. boliviana by the BirdLife Taxonomic Working Group on the basis of the evidence presented by Hennessey (2011).
BirdLife International (2016) Species factsheet: Phibalura flavirostris. Downloaded from http://www.birdlife.org on 04/12/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 04/12/2016.