Data Deficient

Information about Data Deficient

Conservation status
the risk of extinction
Extinction
Extinct Extinct in the Wild
Threatened
Critically Endangered Endangered Vulnerable Threatened
Lower risk
Conservation Dependent Near Threatened Least Concern Domesticated
See also
World Conservation Union IUCN Red List

Data Deficient (DD) is a category applied by the IUCN to a species when the available information is not sufficient for a proper assessment of conservation status to be made. This does not necessarily indicate that the species has not been extensively studied; but it does indicate that little or no information is available on the abundance and distribution of the species. The IUCN recommends that care be taken to avoid classing species as Data Deficient when the absence of records may actually indicate dangerously low abundance: "If the range of a taxon is suspected to be relatively circumscribed, if a considerable period of time has elapsed since the last record of the taxon, threatened status may well be justified."^[1]

Notes

1. ^ "The Categories," in IUCN (1994).

References

IUCN (1994). 1994 Categories & Criteria (version 2.3). 2006 IUCN Red List. Retrieved on 2006-12-17.

conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. Many factors are taken into account when assessing the conservation status of a species: not simply the number remaining, but the
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extinction is the cessation of existence of a species or group of taxa, reducing biodiversity. The moment of extinction is generally considered to be the death of the last individual of that species (although the capacity to breed and recover may have been lost before this point).
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Extinct in the Wild (EW) is a conservation status assigned to species or lower taxa, the only living members of which are being kept in captivity or as a naturalized population outside its historic range.
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critically endangered have an extremely high risk of becoming extinct.

IUCN Category

The World Conservation Union (IUCN), widely considered to be the most objective and authoritative system for classifying species in terms of the risk of extinction^[1]
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endangered species is a population of an organism which is at risk of becoming extinct because it is either few in number, or threatened by changing environmental or predation parameters.
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vulnerable species is a species which is likely to become endangered unless the circumstances threatening its survival and reproduction improve. The following is a very small, non-representative fraction of the 8565 species listed as vulnerable on the IUCN Red List.
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Threatened species are any species (including animals, plants, fungi, insects, bugs, etc.) which are vulnerable to extinction in the near future.

The World Conservation Union (IUCN) is the foremost authority on threatened species, and treats threatened species not as a
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Conservation Dependent (LR/cd) was an IUCN category assigned to species or lower taxa which were dependent on conservation efforts to prevent the taxon becoming threatened with extinction.
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Near Threatened (NT) is a conservation status assigned to species or lower taxa which may be considered threatened with extinction in the near future, although it does not currently qualify for the threatened status.
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Least Concern (LC) is an IUCN category assigned to extant species or lower taxa which have been evaluated but do not qualify for any other category. As such they do not qualify as threatened, nor Near Threatened, nor (prior to 2001) Conservation Dependent.
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Domestication refers to the process whereby a population of animals or plants becomes accustomed to human provision and control. Humans have brought these populations under their care for a wide range of reasons: to produce food or valuable commodities (such as wool, cotton, or
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IUCN

International Organization
Founded October 1948, Fontainebleau, France
Headquarters Rue Mauverney 28, 1196 Gland, Switzerland

Key people Mr Valli Moosa
Ms Julia Marton-LefÃ¨vre
Industry Natural resource conservation
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IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), created in 1963, is the world's most comprehensive inventory of the global conservation status of plant and animal species.
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Abundance is an ecological concept referring to the relative representation of a species in a particular ecosystem. It is usually measured as the mean number of individuals found per sample.
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In biology, the range or distribution of a species is the geographical area within which that species can be found.

The term is often qualified:

sometimes a distinction is made between a species' native range

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