Corvus moriorum pycrafti (South Island Raven)

[surroundx]

Dawson, Elliot W. (1949). Sub-fossil remains from Lake Grassmere. Notornis 3(5): 132-133.

[Peter]

As the divergence of the Chatham Island Raven and New Zealand Raven occurred only 0.15 mya, and ostealogical differences are not distinct with much overlap, Scofield et al. (2016) consider these to be races of a single species, with the South Island population (former race pycrafti) a junior synonym and not a valid subspecies.
...

Scofield, R. Paul, Mitchell, Kieren J., Wood, Jamie R., De Pietri, Vanesa L., Jarvie, Scott, Llamas, Bastien and Cooper, Alan. (2016). The Origin and Phylogenetic Relationships of the New Zealand Ravens. Molecular Phylogenetics and Evolution doi: 10.1016/j.ympev.2016.09.022

Hume, J.P. (2017). Extinct birds (Second edition). Bloomsbury, London.

[surroundx]

Original description:

Gill, B. J. (2003). Osteometry and systematics of the extinct New Zealand ravens (Aves: Corvidae: Corvus). Journal of Systematic Palaeontology 1: 43-58. [Abstract]