Greenway, J. C. 1967. Extinct and vanishing birds of the world. Dover Publications, New York.
Holdaway, R. N. 1999. Introduced predators and avifaunal extinction in New Zealand. In: MacPhee, R.D.E. (ed.), Extinctions in near time: causes, contexts and consequences, pp. 189-238. Plenum Press, New York.
Knox, A. G.; Walters, M. P. 1994. Extinct and endangered birds in the collections of the Natural History Museum. British Ornithologists' Club, Tring, U.K.
Tennyson, A. J. D.; Martinson, P. 2006. Extinct Birds of New Zealand. Te Papa Press, Wellington.
Search for photos and videos, and hear sounds of this species from the Macaulay Library
BirdLife International (2023) Species factsheet: Turnagra capensis. Downloaded from http://www.birdlife.org on 02/04/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 02/04/2023.