Project AVoCet is currently using the taxonomy and common names adopted by BirdLife International (2008), abbreviated BLI herein.
We have been adding synonyms as they occur in our records, and at a later stage we will be implementing some modifications to this taxonomic authority (which will be clearly stated).
However, at the present time, for example some taxa considered full species by the recordist and/or other taxonomic authorities will be listed as subspecies, in accord with BLI.
BirdLife International (2008) The BirdLife checklist of the birds of the world, with conservation status and taxonomic sources. Version 1. Downloaded from http://www.birdlife.org/datazone/