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The New Zealand Threat Classification System is used by the Department of Conservation to assess conservation priorities of species in New Zealand. The system was developed because the IUCN Red List, a similar conservation status system, had some shortcomings for the unique requirements of conservation ranking in New Zealand. ==Categories== Species that are ranked are assigned categories: ;Introduced and Naturalised These are any species that are deliberately or accidentally introduced into New Zealand. ;Vagrant Vagrants are taxa that are rare in New Zealand that have made their own way and do not breed successfully. ;Coloniser These taxa have arrived in new Zealand without human help and reproduce successfully. ;Migrant Migrant species are those that visit New Zealand as part of their life cycle. ;Data Deficient This category lists taxa for which insufficient information is available to make as assessment on conservation status. ;Extinct Taxa for which there is no reasonable doubt that no individuals exist are ranked as extinct. For these lists only species that have become extinct since 1840 are listed. ;Threatened This category has three major divisions: *;Acutely Threatened This division is further broken down into: :: *Nationally Critical - equivalent to the IUCN category of Critically endangered :: *Nationally Endangered - equivalent to the IUCN category of Endangered :: *Nationally Vulnerable - equivalent to the IUCN category of Vulnerable *;Chronically Threatened This has two categories: :: *Serious Decline :: *Gradual Decline *;At Risk This has two categories: :: *Range Restricted :: *Sparse ;Not Threatened If taxa fit into none of the other categories they are listed in the Not Threatened category. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「New Zealand Threat Classification System」の詳細全文を読む スポンサード リンク
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