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An IUCN Red List Critically Endangered (CR or sometimes CE) species is one that has been categorized by the International Union for Conservation of Nature as facing an extremely high risk of extinction in the wild. As of December 2023, of the 157,190 species currently on the IUCN Red List, 9,760 of those are listed as Critically ...
- List of critically endangered mammals
Critically endangered (CR) species face an extremely high...
- List of Critically Endangered Birds
Critically endangered (CR) species face an extremely high...
- List of critically endangered mammals
Definição IUCN. Ver também. Referências. Espécie em perigo crítico é a categoria de espécies de fungos, plantas e animais que correm o maior risco de extinção, conforme classificação atribuída pela IUCN. Essas espécies são incluídas na Lista Vermelha da IUCN.
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Species are classified by the IUCN Red List into nine groups, specified through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmentation. There is an emphasis on the acceptability of applying any criteria in the absence of high quality data including suspicion and po...
There have been a number of versions, dating from 1991, including: 1. Version 1.0 (1991) 2. Version 2.0 (1992) 3. Version 2.1 (1993) 4. Version 2.2 (1994) 5. Version 2.3 (1994) 6. Version 3.0 (1999) 7. Version 3.1 (2001) All new IUCN assessments since 2001 have used version 3.1 of the categories and criteria.
In 1997, the IUCN Red List received criticism on the grounds of secrecy (or at least poor documentation) surrounding the sources of its data. These allegations have led to efforts by the IUCN to improve its documentation and data quality, and to include peer reviews of taxa on the Red List.The list is also open to petitions against its classificati...
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The IUCN Red List Categories and Criteria are intended to be an easily and widely understood system for classifying species at high risk of global extinction. It divides species into nine categories: Not Evaluated, Data Deficient, Least Concern, Near Threatened, Vulnerable, Endangered, Critically Endangered, Extinct in the Wild and Extinct.
Version 2014.2 of the IUCN Red List of Threatened Species identified 4574 Critically Endangered species, subspecies and varieties, stocks and subpopulations.
