[4] According to archeological and genetic research, the ancestors of the Māori arrived in New Zealand no earlier than about 1280 CE, with at least the main settlement period between about 1320 and 1350,[5][4] consistent with evidence based on whakapapa (genealogical traditions).
[9][10] From the late 18th century, the country was regularly visited by explorers and other sailors, missionaries, traders and adventurers.
[11][12][13] As a result of the influx of settlers, the population of Pākehā (European New Zealanders) grew explosively from fewer than 1,000 in 1831 to 500,000 by 1881.
[14] Numerous species have disappeared from New Zealand as part of the ongoing Holocene extinction, driven by human activity.
[15] The Māori also brought two species of land mammals, Polynesian rats (Rattus exulans) and kurī, a breed of domestic dog (Canis lupus familiaris).