chathamensis Chatham kaka The genus Nestor is one of the two extant genera of the parrot family Strigopidae.

[3] The superficial resemblance of this tongue to that of lorikeets has led some taxonomists to consider the two groups closely related, but DNA evidence shows they are not.

[4][5] All four species in the genus Nestor are thought to stem from a 'proto-kaka', dwelling in the forests of New Zealand 5 million years ago.

[9] This proposal has not been adopted in lists of the world birds and instead Nestor is placed with the genus Strigops in the family Strigopidae.

The Chatham kaka became extinct in pre-European times, after Polynesians arrived at the island, between 1550 and 1700, and is only known from subfossil bones.