When Europeans arrived in New Zealand the pressures on New Zealand's previously isolated and mammal-free fauna and flora intensified. When 'rediscovered' in 1948 just 250 to 300 takahe survived, and the population has undergone further declines since that time (3). Habitat modification and the introduction of predators such as dogs to lowland habitats were significant in the decline of takahe numbers, although these birds were probably never particularly numerous (6). More recently, harsh winters (3) and competition for grass tussocks with introduced red deer (Cervus elaphus) (6), have caused great fluctuations in the precarious populations that remain; predation by the introduced stoat (Mustela erminea) may also have taken its toll (3).
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