The genus Nestor is the type and only extant genus of the parrot family Nestoridae. Together with the kakapo, and the extinct parrots in the genus Nelepsittacus, they form the parrot superfamily Strigopoidea. The genus Nestor contains two extant parrot species from New Zealand and two extinct species from Norfolk Island and Chatham Island, New Zealand, respectively. All species are large stocky birds with short squarish tails. A defining characteristic of the genus is the tongue, which is tipped with a hair-like fringe. 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.