The initial deadline for comments on this topic is 10 March 2014, and therefore later than for most other topics currently under discussion.
This is part of a consultation on the Red List implications of extensive changes to BirdLife’s taxonomy for non-passerines
Lynx Edicions and BirdLife International will soon publish the HBW-BirdLife Illustrated Checklist of the Birds of the World, building off the Handbook of the Birds of the World series, and BirdLife’s annually updated taxonomic checklist.
The new Checklist will be based on the application of criteria for recognising species limits described by Tobias et al. (2010). Full details of the specific scores and the basis of these for each new taxonomic revision will be provided in the Checklist.
Following publication, an open and transparent mechanism will be established to allow people to comment on the taxonomic revisions or suggest new ones, and provide new information of relevance in order to inform regular updates. We are also actively seeking input via a discussion topic here regarding some potential taxonomic revisions that currently lack sufficient information.
The new Checklist will form the taxonomic basis of BirdLife’s assessments of the status of the world’s birds for the IUCN Red List. The taxonomic changes that will appear in volume 1 of the checklist (for non-passerines) will begin to be incorporated into the 2014 Red List update, with the remainder, and those for passerines (which will appear in volume 2 of the checklist), to be incorporated into subsequent Red List updates.
Preliminary Red List assessments have been carried out for the newly split or lumped taxa. We are now requesting comments and feedback on these preliminary assessments.
Australian Masked-owl Tyto novaehollandiae, Lesser Masked-owl T. sororcula and Manus Masked-owl T. manusi are being lumped as T. novaehollandiae, following the application of criteria set out by Tobias et al. (2010).
Prior to this taxonomic change Tyto novaehollandiae (BirdLife species factsheet), a widespread resident in Australia and southern New Guinea, was listed as being of Least Concern, on the basis that it was not thought to approach the thresholds for Vulnerable under any of the IUCN criteria. T. manusi (BirdLife species factsheet), restricted to the island of Manus, was listed as Vulnerable under criteria C2a(i); D, because it was thought to have a very small population, likely to be in decline owing to habitat loss. T. sororcula (BirdLife species factsheet), known from Buru, the Tanimbar Islands and probably present on Seram, was listed as Data Deficient on the basis that there was insufficient information available for a robust assessment of its risk of extinction against the IUCN Red List criteria.
Following the taxonomic change, T. novaehollandiae is thought likely to qualify as being of Least Concern, on the basis that it does not approach the thresholds for Vulnerable under any of the Red List criteria.
Comments on this suggested category are invited and further information would be welcomed.
Tobias, J. A., Seddon, N., Spottiswoode, C. N., Pilgrim, J. D., Fishpool, L. D. C. and Collar, N. J. (2010) Quantitative criteria for species delimitation. Ibis 152: 724–746.