Recent taxonomic revision has reduced number of recognised subspecies from 8 to 5 (including 1 extinct - Lord Howe). 3 closely related taxa, C.saisseti (New Caledonia), C.cookii (Norfolk Island) and C.hochstetteri (Antipodes Island) are now considered to be seperate species. Ref. Checklist of the Birds of New Zealand 4th ed. Te Papa press / Ornithological Society of New Zealand.
Recent taxonomic revision has reduced number of recognised subspecies from 8 to 5 (including 1 extinct - Lord Howe). 3 closely related taxa, C.saisseti (New Caledonia), C.cookii (Norfolk Island) and C.hochstetteri (Antipodes Island) are now considered to be seperate species. Ref. Checklist of the Birds of New Zealand 4th ed. Te Papa press / Ornithological Society of New Zealand.