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VULNERABLE/CRITERIA


source: http://intranet.iucn.org/
webfiles/doc/SSC/RedList/
redlistcatsenglish.pdf

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vulnerable

A taxon* is ‘vulnerable’ (VU) when it is not ‘critically endangered’ or ‘endangered’ but is facing a high risk of extinction in the wild in the medium-term future:

  • an observed, estimated, inferred or suspected reduction of at least 20% over the last 10 years or three generations;


  • a reduction of at least 20%, projected or suspected to be met within the next 10 years or three generations;


  • extent of occurrence estimated to be less than 20000 km2 or area of occupancy estimated to be less than 2000 km2;


  • population estimated to number less than 10000 mature individuals (or an estimated continuing decline of at least 10% within 10 years or 3 generations);


  • population very small or restricted, estimated to number less than 1000 mature individuals.


  • quantitative analysis showing the probability of extinction in the wild is at least 10% within 100 years.



Taxon: a taxonomic category or group of plants and animals classified according to their presumed natural relationships.
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