Kakapo became isolated from the remaining parrot species when New Zealand broke off from Gondwana, around 82 million years ago. Around 30 million years ago, the kakapo diverged from the genus "Nestor". Earlier ornithologists felt that the kakapo might be related to the ground parrots and night parrot of Australia due to their similar coloration, but this is contradicted by recent studies; rather, the cryptic colour seems to be adaptation to terrestrial habits that evolved twice convergently. The kakapo is a large, rotund parrot; the adult can measure from in length, and weight can vary from at maturity. Males are larger
Kakapo pre-Polynesian times, the kakapo was New Zealand's third most common bird and it was widespread on all three main islands. However, the kakapo population in New Zealand has declined massively since human settlement of the country. Since 1891, conservation efforts have been made to prevent extinction. The most successful scheme has been the Kakapo Recovery Programme; this was implemented in 1995 and continues. The first factor in the decline of the kakapo was the arrival of humans. Māori folklore suggests that the kakapo was found throughout the country when the Polynesians first arrived in Aotearoa 700 years ago. Subfossil and