Data Deficient (DD) is a category applied by the IUCN Red List, other agencies, and individuals 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" (see also precautionary principle).
All items (261)
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- Acrobatic Cavy
- AEECL's Sportive Lemur
- African Angelshark
- African Chimaera
- Andean Porcupine
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- Andinobates claudiae
- Anodonthyla moramora
- Anodonthyla pollicaris
- Anodonthyla theoi
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- Arapaima Gigas
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- Asháninka Arboreal Chinchilla Rat
- Asian Sheepshead Wrasse
- Assam Keelback
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- Atelopus palmatus
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- Atretochoana
- Balkhash Perch
- Balston's Pygmy Perch
- Banded Supple Skink
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- Barbary Stag
- Bearded Pygmy Chameleon
- Belgica
- Belgica albipes
- Belgica antarctica
- Big Red Bat
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- Black Hagfish
- Black Pika
- Black Shrew
- Black-headed Marmoset
- Black-spotted Leaf-toed Gecko
- Blue-black Kingfisher
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- Bornean Pygmy Shrew
- Bornean Smooth-tailed Treeshrew
- Botan Shrimp
- Broadnose Sevengill Shark
- Brown Hairy Dwarf Porcupine
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- Calamian Treeshrew
- Caribbean Roughshark
- Caspian Cobra
- Cayenne Nightjar
- Celsiella vozmedianoi
- Cerrado Red-nosed Mouse
- Chestnut-shouldered Goshawk
- Chinese Mantis
- Chirodectes
- Chocolate Pipefish
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- Chum Salmon
- Coho Salmon
- Colombian Crake
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- Crepidophryne epiotica
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- Cryptopygus antarcticus
- Csorba's Mouse-eared Bat
- Cuban Chimaera
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- Hamiguitan Hairy-tailed Rat
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- Hernández-Camacho's Night Monkey
- Hooktooth Dogfish
- Horn Shark
- Hose's Pygmy Flying Squirrel
- Hyalinobatrachium duranti
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- Paretroplus lamenabe
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- Philippine Tailless Leaf-nosed Bat
- Pigeye shark
- Pink Fairy Armadillo
- Platypelis cowanii
- Platypelis pollicaris
- Plethodontohyla minuta
- Pointy-nosed Blue Chimaera
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- Forum:Projects
- Ptychochromis Ernestmagnusi
- Ptychohyla acrochorda
- Ptychohyla zophodes
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- Purple Chimaera
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- Pygmy Sperm Whale