Biology Department
Birds on the IUCN Red List
The International Union for Conservation of Nature and Natural Resources (IUCN) Red List of Threatened Species provides taxonomic, conservation status and distribution information on taxa that have been globally evaluated using the IUCN Red List Categories and Criteria. This system is designed to determine the relative risk of extinction, and the main purpose of the IUCN Red List is to catalogue and highlight those taxa that are facing a higher risk of global extinction (i.e. those listed as Critically Endangered, Endangered and Vulnerable). The IUCN Red List also includes information on taxa that are categorized as Extinct or Extinct in the Wild; on taxa that cannot be evaluated because of insufficient information (i.e. are Data Deficient); and on taxa that are either close to meeting the threatened thresholds or that would be threatened were it not for an ongoing taxon-specific conservation programme (i.e. are Near Threatened).
Visit the IUCN Web Site: http://www.iucnredlist.org/
The IUCN Red List at BirdLife International
The IUCN Red List of threatened species is widely considered to be the most objective and authoritative system for classifying species in terms of the risk of extinction. Information on a taxon's population size, population trends and range size are applied to standard quantitative criteria to determine its IUCN Red List Category (Extinct, Extinct in the Wild, Critically Endangered, Endangered, Vulnerable, Near Threatened or Least Concern). Species for which there is insufficient information to apply the criteria are assessed as Data Deficient. Additional information on ecology and habitat preferences, threats and conservation action are also collated and assessed as part of Red List process.
BirdLife International is the official Red List Authority for birds for the IUCN Red List, supplying the categories and associated detailed documentation for all the world's birds to the IUCN Red List each year.
Visit the BirdLife International Web Site: http://www.birdlife.org/action/science/species/global_species_programme/red_list.html
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