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National Institutions – 04

Criteria for Critically Endangered:

A.  Reduction in population size:
1. Reduction of population ≥ 90% over the last 10 years or three generations, whichever is the longer, where the causes of the reduction are clearly reversible AND understood AND ceased.

2. Reduction of population ≥ 80% over the last 10 years or three generations, whichever is the longer, where the reduction or its causes may not have ceased OR may not be understood OR may not be reversible.
B. Geographic range in the form of either B1 (extent of occurrence) OR B2 (area of occupancy):
B.1. Extent of occurrence estimated to be less than 100 km2, and estimates indicating severely fragmented or known to exist at only a single location.
B.2. Area of occupancy estimated to be less than 10 km2, and severely fragmented or known to exist at only a single location.
C. Population size estimated to number fewer than 250 mature individuals and an estimated continuing decline of at least 25% within three years or one generation, whichever is longer.
D. Population size estimated to number fewer than 50 mature individuals.
E. Quantitative analysis showing the probability of extinction in the wild is at least 50% within 10 years or three generations, whichever is the longer (up to a maximum of 100 years).
4. Endangered (EN)
A taxon is Endangered when the best available evidence indicates that it meets any of the criteria A to E for Endangered, and it is therefore considered to be facing a very high risk of extinction in the wild.

Criteria for Endangered:

  1. Reduction in population size based on any of the following:
    1. Reduction in population ≥ 70% over the last 10 years or three generations, whichever is the longer, where the causes of the reduction are clearly reversible AND understood AND ceased.
    2. An observed, estimated, inferred or suspected population size reduction of ≥ 50% over the last 10 years or three generations, whichever is the longer, where the reduction or its causes may not have ceased OR may not be understood OR may not be reversible.
    B. Geographic range in the form of either B1 (extent of occurrence) OR B2 (area of occupancy) OR both:
    B.1. Extent of occurrence estimated to be less than 5000 km2, and severely fragmented or known to exist at no more than five locations.
    B.2. Area of occupancy estimated to be less than 500 km2, and severely fragmented or known to exist at no more than five locations.
    C. Population size estimated to number fewer than 2500 mature individuals and an estimated continuing decline of at least 20% within five years or two generations, whichever is longer.
    D. Population size estimated to number fewer than 250 mature individuals.
  2. Quantitative analysis showing the probability of extinction in the wild is at least 20% within 20 years or five generations, whichever is the longer.
    5. Vulnerable (VU)
    A taxon is Vulnerable when the best available evidence indicates that it meets any of the criteria A to E for Vulnerable, and it is therefore considered to be facing a high risk of extinction in the wild.
    Criteria for Vulnerable:
    A. Reduction in population size based on any of the following:
    1. Reduction in population ≥ 50% over the last 10 years or three generations, whichever is the longer, where the causes of the reduction are: clearly reversible AND understood AND ceased.
    2. Reduction of population ≥ 30% over the last 10 years or three generations, whichever is the longer, where the reduction or its causes may not have ceased OR may not be understood OR may not be reversible.
    B. Geographic range in the form of either B1 (extent of occurrence) OR B2 (area of occupancy) OR both:
    B.1. Extent of occurrence estimated to be less than 20,000 km2, and severely fragmented or known to exist at no more than 10 locations.
    B.2. Area of occupancy estimated to be less than 2000 km2, and estimates indicating severely fragmented or known to exist at no more than 10 locations.\
    C. Population size estimated to number fewer than 10,000 mature individuals and an estimated continuing decline of at least 10% within 10 years or three generations, whichever is longer.
    D. Population size estimated to number fewer than 1000 mature individuals.
    E. Quantitative analysis showing the probability of extinction in the wild is at least 10% within 100 years.
    6. Near Threatened (NT)
    A taxon is Near Threatened when it has been evaluated against the criteria but does not qualify for Critically Endangered, Endangered or Vulnerable now, but is close to qualifying for or is likely to qualify for a threatened category in the near future.
  3. Least Concern (LC)
    A taxon is Least Concern when it has been evaluated against the criteria and does not qualify for Critically Endangered, Endangered, Vulnerable or Near Threatened.
  4. Data Deficient (DD)
    A taxon is Data Deficient when there is inadequate information to make a direct, or indirect, assessment of its risk of extinction based on its distribution and/or population status.
  5. Not Evaluated (NE)
    A taxon is Not Evaluated when it is has not yet been evaluated against the criteria.

CMS (CONVENTION ON THE CONSERVATION OF MIGRATORY SPECIES):

As an environmental treaty under the aegis of the United Nations Environment Programme, CMS provides a global platform for the conservation and sustainable use of migratory animals and their habitats. CMS brings together the States through which migratory animals pass, the Range States, and lays the legal foundation for internationally coordinated conservation measures throughout a migratory range.

As the only global convention specializing in the conservation of migratory species, their habitats and migration routes, CMS complements and co-operates with a number of other international organizations, NGOs and partners in the media as well as in the corporate sector.

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