Why are some weta (Orthoptera: Stenopelmatidae) vulnerable yet others are common?

@article{Gibbs2004WhyAS,
  title={Why are some weta (Orthoptera: Stenopelmatidae) vulnerable yet others are common?},
  author={George W. Gibbs},
  journal={Journal of Insect Conservation},
  year={2004},
  volume={2},
  pages={161-166}
}
  • G. Gibbs
  • Published 12 September 1998
  • Environmental Science
  • Journal of Insect Conservation
The large (4 g) to very large (40 g) stenopelmatid orthopterans of New Zealand are known collectively as weta. A consideration of 20 species of Hemideina, Deinacrida and tusked weta reveals that at one end of a vulnerability gradient are those species which thrive in the presence of key predators (rats), while at the other end are species that have become extinct on the mainland but still survive on predator-free island refuges. Habitat modification does not appear to be a factor in these… 

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