del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
Turbott, E.G. 1990. Checklist of the Birds of New Zealand. Ornithological Society of New Zealand, Wellington.
Red List criteria met
Red List history
IUCN Red List criteria met and history
||not a migrant
Population justification: The population is estimated to number 278 mature individuals on Rangatira Island. This constitutes a tiny proportion (much less than 5%) of the species's range, and so the total population is likely to number 5,560 mature individuals at the very least, but probably considerably more. It is precautionarily placed in the band 2,500-9,999 mature individuals. This equates to 3,750-14,999 individuals in total, rounded here to 3,500-15,000 individuals.
Trend justification: This population is suspected to be in decline owing to ongoing habitat destruction and the effects of introduced species (Higgins et al. 2001).
Important Bird and Biodiversity Areas (IBA)
BirdLife International (2023) Species factsheet: Prosthemadera novaeseelandiae. Downloaded from
http://datazone.birdlife.org/species/factsheet/tui-prosthemadera-novaeseelandiae on 27/09/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 27/09/2023.