The list of New Zealand Birds used by BUBO Listing is based on the 'New Zealand Recognised Bird Names' made available by the Ornithological Society of New Zealand. The OSNZ was founded in 1939 and aims to "foster the study, knowledge and enjoyment of birds".
The checklist currently used is derived from the 3rd edition (1990) of the OSNZ's Checklist of the Birds of New Zealand and the Ross Dependency, Antarctica and includes some subsequent decisions of the Rare Birds Committee of the OSNZ. Unfortunately the NZRBN list has not been kept up to date online so we have a number of species, and taxonomy changes, missing. If anyone is able to provide the list from "Checklist Committee 2010. Checklist of the Birds of New Zealand, Norfolk and Macquarie Islands, and the Ross Dependency, Antarctica. 4th ed. Wellington, Te Papa Press" in an electronic format we will look to update our NZ list.