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Nestor (genus)
The genus ''Nestor'' is one of two genera of the parrot family Nestoridae. Together with the kakapo in the family Strigopidae, they form the parrot superfamily Strigopoidea. The genus ''Nestor'' contains two extant parrot species from New Zealand and two extinct species from Norfolk Island, Australia 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.〔
==Classification==
All four species in the genus ''Nestor'' are thought to stem from a 'proto-kākā', dwelling in the forests of New Zealand 5 million years ago. The closest living relative of the genus is the kākāpō (''Strigops habroptila'').〔〔〔de Kloet, R.S.; de Kloet, S.R. (2005). The evolution of the spindlin gene in birds: sequence analysis of an intron of the spindlin W and Z gene reveals four major divisions of the Psittaciformes. ''Molecular Phylogenetics and Evolution'' 36: 706–721.〕 Together, they form the Strigopoidea, with comprises an ancient group that split off from all other Psittaciformes before their radiation.〔〔〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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