This taxon is Not Recognised as a species by BirdLife International.
Hydrobates leucorhous (del Hoyo and Collar 2014) was previously placed in the genus Oceanodroma as O. leucorhoa.
BirdLife International (2018) Species factsheet: Hydrobates leucorhous. Downloaded from http://www.birdlife.org on 09/12/2018. Recommended citation for factsheets for more than one species: BirdLife International (2018) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 09/12/2018.