Lists of IUCN Red List data deficient species
On 29 January 2010, the IUCN Red List of Threatened Species identified 6,702 data deficient species.
;Lists of data deficient species
- Animals
- *Amphibians — List of data deficient amphibians
- *Birds — List of data deficient birds
- *Fish — List of data deficient fishes
- *Invertebrates — List of data deficient invertebrates
- **Arthropods — List of data deficient arthropods
- ***Insects — List of data deficient insects
- **Molluscs List of data deficient molluscs
- *Mammals — List of data deficient mammals
- *Reptiles — List of data deficient reptiles
- Plants — List of data deficient plants
- Chromista/Protista — List of Chromista by conservation status
- Fungi — List of fungi by conservation status
Older lists (IUCN 2009.2)
- Annelida — IUCN Red List data deficient species (Annelida)
- Chordata — IUCN Red List data deficient species (Chordata)
- Cnidaria — IUCN Red List data deficient species (Cnidaria)
- Nemertina — IUCN Red List data deficient species (Nemertina)
- Onychophora — IUCN Red List data deficient species (Onychophora)
- Protista — IUCN Red List data deficient species (Protista)