When humans arrived in New Zealand about 700 years ago the environment changed quickly. Several species were hunted to extinction, most notably the moa ("Dinornithidae") and Haast's eagle ("Harpagornis moorei"). The most damage was caused by habitat destruction and the other animals humans brought with them, particularly rats – the Polynesian rat or kiore introduced by Māori and the brown rat and black rat subsequently introduced by Europeans. Mice, dogs, cats, stoats, weasels, pigs, goats, deer, hedgehogs, and Australian possums also put pressure upon native bird species. The flightless birds were especially sensitive.