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Australian magpies in New Zealand : ウィキペディア英語版 | Australian magpies in New Zealand
The Australian magpie is a medium-sized black and white passerine bird native to Australia and southern New Guinea. Two species, the Black-backed (''Gymnorhina tibicen'') and White-backed (''Gymnorhina tibicen hypoleuca'') magpies, were introduced into New Zealand to control pests in pastures but have themselves become an invasive species. The birds can be aggressive and commonly attack humans and native birds. Cyclists can also be attacked, especially during nesting season of the bird. ==Introduction into New Zealand== Birds taken mainly from Tasmania and Victoria in Australia were introduced into New Zealand by local Acclimatisation Societies of Otago and Canterbury in the 1860s, with the Wellington Acclimatisation Society releasing 260 birds in 1874. White-backed forms are spread on both the North and eastern South Island, while Black-backed forms are found in the Hawke's Bay region. Magpies were introduced into New Zealand to control agricultural pests, and were therefore a protected species until 1951. It is currently illegal to breed, sell, or distribute the birds within New Zealand.
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