Traits:ExtinctInTheWild
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Extinct in the Wild (EW)
Extinct in the Wild (EW): A taxon is Extinct in the Wild when it is known only to survive in cultivation, in captivity or as a naturalized population (or populations) well outside the past range. A taxon is presumed Extinct in the Wild when exhaustive surveys in known and/or expected habitat, at appropriate times (diurnal, seasonal, annual), throughout its historic range have failed to record an individual. Surveys should be over a time frame appropriate to the taxon’s life cycle and life form.
- [[ExtinctInTheWild|Extinct in the Wild (EW)]]
References:
- IUCN. (2012). IUCN Red List Categories and Criteria: Version 3.1. Second edition. Gland, Switzerland and Cambridge, UK: IUCN. iv + 32pp.
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A taxon is Extinct in the Wild when it is … A taxon is Extinct in the Wild when it is known only to survive in cultivation, in captivity</br>or as a naturalized population (or populations) well outside the past range. A taxon is</br>presumed Extinct in the Wild when exhaustive surveys in known and/or expected habitat,</br>at appropriate times (diurnal, seasonal, annual), throughout its historic range have failed</br>to record an individual. Surveys should be over a time frame appropriate to the taxon’s</br>life cycle and life form.e to the taxon’s
life cycle and life form. +
IUCN. (2012). IUCN Red List Categories and Criteria: Version 3.1. Second edition.
Gland, Switzerland and Cambridge, UK: IUCN. iv + 32pp. +
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