They're not the longest parrot in the world, but they are (by far) the heaviest. Critically endangered too
"The Kakapo (Māori: kākāpō, meaning night parrot), Strigops habroptila (Gray, 1845), also called owl parrot, is a species of large, flightless nocturnal parrot endemic to New Zealand."
"The Kakapo is critically endangered; as of February 2010, only 122 living individuals are known, most of which have been given names.The common ancestor of the Kakapo and the genus Nestor became isolated from the remaining parrot species when New Zealand broke off from Gondwana, around 82 million years ago. Around 70 million years ago, the kakapo diverged from the genus Nestor. In the absence of mammalian predators, it lost the ability to fly."
"Because of Polynesian and European colonisation and the introduction of predators such as cats, rats, and stoats,the Kakapo was almost wiped out. Conservation efforts began in the 1890s, but they were not very successful until the implementation of the Kakapo Recovery Plan in the 1980s. As of January 2009, surviving Kakapo are kept on two predator-free islands, Codfish (Whenua Hou) and Anchor islands, where they are closely monitored."http://en.wikipedia.org/wiki/Kakapo
Good old wikipedia link if you'd like to have a read.