N
- Nannoperca oxleyana — Oxleyan Pygmy Perch
- Nannophrys marmorata
- Nanocopia minuta
- Nanodectes bulbicercus
- Napaeus isletae
- Nasalis larvatus — Long-nosed Monkey, Proboscis Monkey
- Nasikabatrachus sahyadrensis
- Natalina beyrichi — Pondoland Cannibal Snail
- Natalobatrachus bonebergi
- Neamblysomus gunningi — Gunning's Golden Mole
- Neamblysomus julianae — Juliana's Golden Mole
- Nectarinia loveridgei — Loveridge's Sunbird
- Nectomys parvipes — Small-footed Bristly Mouse
- Nectophrynoides asperginis — Kihansi Spray Toad
- Nectophrynoides cryptus
- Nectophrynoides minutus
- Nectophrynoides poyntoni
- Nectophrynoides pseudotornieri
- Nectophrynoides vestergaardi
- Nectophrynoides wendyae
- Necturus alabamensis — Black Warrior Waterdog
- Nemacheilus dori
- Nemacheilus jordanicus
- Nemacheilus pantheroides
- Nemacheilus sp. nov.
- Nemapalpus nearcticus — Sugarfoot Moth Fly
- Nemosia rourei — Cherry-throated Tanager
- Neochromis simotes
- Neophema chrysogaster — Orange-bellied Parrot
- Neoplanorbis tantillus
- Neospiza concolor — São Tomé Grosbeak
- Neotoma anthonyi — Anthony's Woodrat
- Neotoma bryanti — Bryant's Woodrat
- Neotoma bunkeri — Bunker's Woodrat
- Neotoma martinensis — San Martin Island Woodrat
- Neotoma nelsoni — Nelson's Woodrat
- Neotoma varia — Turner Island Woodrat
- Nephelobates alboguttatus
- Nephelobates duranti
- Nephelobates haydeeae
- Nephelobates mayorgai
- Nephelobates meridensis
- Nephelobates molinarii
- Nephelobates orostoma
- Nephelobates serranus
- Nephrurus deleani
- Neritina tiassalensis
- Nesoenas mayeri — Pink Pigeon
- Nesolagus netscheri — Sumatran Striped Rabbit
- Nesomimus melanotis — San Cristobal Mockingbird
- Nesomimus trifasciatus — Floreana Mockingbird
- Nesopsar nigerrimus — Jamaican Blackbird
- Nesoscaptor uchidai — Ryūkyū Mole
- Nestor meridionalis — Kākā
- Neurergus kaiseri
- Neurergus microspilotus
- Neusticomys mussoi — Musso's Fish-eating Rat
- Neusticomys oyapocki — Oyapock's Fish-eating Rat
- Neusticomys peruviensis — Peruvian Fish-eating Rat
- Neusticomys venezuelae — Venezuelan Fish-eating Rat
- Newcombia canaliculata
- Newcombia cumingi
- Newcombia lirata
- Newcombia perkinsi
- Newcombia pfeifferi
- Newcombia sulcata
- Nicrophorus americanus — American Burying Beetle
- Nilopegamys plumbeus — Ethiopian Amphibious Rat, Ethiopian Water Mouse
- Nilssonia formosa — Burmese Peacock Softshell
- Nimbaphrynoides liberiensis
- Nimbaphrynoides occidentalis — Mt Nimba Viviparous Toad, Western Nimba Toad
- Nipponia nippon — Crested Ibis
- Nirodia belphegor
- Nomascus concolor — Black Gibbon, Crested Gibbon, Indochinese Gibbon
- Nomascus nasutus — Eastern Black Crested Gibbon, Eastern Black Gibbon
- Nothobranchius sp. nov. — Caprivi killifish
- Nothomyrmecia macrops — Australian Ant
- Nothophryne broadleyi
- Notogomphus cottarellii
- Notogomphus maathaiae
- Notogomphus ruppeli
- Notopala sublineata
- Notophthalmus meridionalis — Black-spotted Newt
- Notoryctes caurinus — Northern Marsupial Mole, Northwestern Marsupial Mole
- Notoryctes typhlops — Marsupial Mole, Southern Marsupial Mole
- Nototriton barbouri
- Nototriton lignicola
- Nototriton limnospectator
- Notropis cahabae — Cahaba Shiner
- Notropis mekistocholas — Cape Fear Shiner
- Notropis moralesi
- Notropis simus — Bluntnose Shiner
- Noturus baileyi — Smoky Madtom
- Noturus trautmani — Scioto Madtom
- Numenius borealis — Eskimo Curlew
- Numenius tenuirostris — Slender-billed Curlew
- Nyctanolis pernix
- Nyctibatrachus aliciae
- Nyctibatrachus beddomii
- Nyctibatrachus hussaini
- Nyctibatrachus minor
- Nyctibatrachus sanctipalustris
- Nyctibatrachus vasanthi
- Nyctimene rabori — Philippine Tube-nosed Fruit Bat
- Nyctimystes dayi — Australian Lace-lid
- Nyctophilus heran — Sunda Long-eared Bat
Read more about this topic: IUCN Red List Endangered Animal Species