Pretty much any native New Zealand species is endangered , critically endangered or extinct . Tuatara are the last of a line that go back 200 million years and which live 150 years or more , nobody know because nobody has outlived then to find out, The one in Invercargill is at least 150 years old and still breeding (hope springs eternal) his girlfriends are mere striplings at 90 years. The kiwi is threatened by all the predators that have been introduced to NZ , possums , cats , dogs , rats etc. Its the chicks that are most at risk . In the wild only 4% survive so conservationist collect the eggs , rear the chicks until the bird is big enough to fight off predators and this way the survival rate increase to 65%.