Data deficient

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Lower Risk

Other categories

Related topics

IUCN Red List category abbreviations (version 3.1, 2001)
Comparison of Red List classes above
and NatureServe status below
NatureServe category abbreviations

A data deficient (DD)

of the species.

The IUCN recommends that care be taken to avoid classing species as "data deficient" when the absence of records may 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] (see also precautionary principle).

See also


  1. ^ "The Categories", in IUCN (1983).

External links

  • IUCN (2001). "2001 Categories & Criteria (version 3.1)". 2014 IUCN Red List. Retrieved 2014-08-26.