There are 128 mammals that start with the letter A, from Aardvark to Avahi. Below you will find them listed alphabetically along with some general information about each. Click the toggle view buttons in the top right corner to switch between the card and the table view.
For each item you will find the following information
Order: The subclass the mammals belongs to
Habitat: The places or type of weather the mammals lives in
Scientific name: The designation that scientists use to catalog the species
Name: Aardvark
Order: Tubulidentata
Habitat: Savannas and grasslands in Africa
Scientific name: Orycteropus afer
Name: Aardwolf
Order: Carnivora
Habitat: Savannas and grasslands in Africa
Scientific name: Proteles cristata
Name: Abaco Island Raccoon
Order: Carnivora
Habitat: Bahamas
Scientific name: Procyon lotor
Name: Abaco Parrot
Order: Carnivora
Habitat: The Bahamas
Scientific name: Amazona leucocephala bahamensis
Name: Abaco Woodrat
Order: Rodentia
Habitat: Bahamas
Scientific name: Neotoma abbotti
Name: Abaggar Gazelle
Order: Artiodactyla
Habitat: North Africa
Scientific name: Gazella cuvieri
Name: Aberdare Colobus
Order: Primates
Habitat: Kenya
Scientific name: Colobus guereza caudatus
Name: Abert's Squirrel
Order: Rodentia
Habitat: Southwestern United States and Mexico
Scientific name: Sciurus aberti
Name: Abo Gazelle
Order: Artiodactyla
Habitat: Sudan
Scientific name: Gazella dorcas abae
Name: Abyssinian Clawless Otter
Order: Carnivora
Habitat: Ethiopia
Scientific name: Aonyx capensis meneliki
Name: Abyssinian Gazelle
Order: Artiodactyla
Habitat: Ethiopia
Scientific name: Eudorcas tilonura
Name: Abyssinian Genet
Order: Carnivora
Habitat: Ethiopia
Scientific name: Genetta abyssinica
Name: Abyssinian Ground Hornbill
Order: Aves
Habitat: Ethiopia
Scientific name: Bucorvus abyssinicus
Name: Abyssinian Hare
Order: Lagomorpha
Habitat: Grasslands and scrublands in northeast Africa
Scientific name: Lepus habessinicus
Name: Acadian Pocket Mouse
Order: Rodentia
Habitat: Eastern Canada and Northeastern United States
Scientific name: Perognathus flavescens
Name: Acadian Pygmy Shrew
Order: Eulipotyphla
Habitat: North America
Scientific name: Sorex hoyi
Name: Acadian Red Bat
Order: Chiroptera
Habitat: Northeastern North America
Scientific name: Lasiurus borealis acadicus
Name: Acari Mountain Cave Rat
Order: Rodentia
Habitat: Central Asia
Scientific name: Karnimata araxis
Name: Acornworm
Order: Chordata
Habitat: Gulf of Mexico
Scientific name: Bascanichthys scuticaris
Name: Acrobat Mouse
Order: Rodentia
Habitat: Southeast Asia
Scientific name: Paraspini saurus
Name: Addax
Order: Artiodactyla
Habitat: Desert and semi-desert in North Africa
Scientific name: Addax nasomaculatus
Name: Addo Elephant
Order: Proboscidea
Habitat: South Africa
Scientific name: Loxodonta africana addonensis
Name: Addra Gazelle
Order: Artiodactyla
Habitat: North Africa
Scientific name: Nanger dama
Name: Adi Goral
Order: Artiodactyla
Habitat: Northeastern India and Myanmar
Scientific name: Naemorhedus baileyi
Name: Admiralty Wallaby
Order: Diprotodontia
Habitat: New Guinea
Scientific name: Petrogale penicillata
Name: Aegean Dolphin
Order: Cetacea
Habitat: Greece
Scientific name: Delphinus delphis ponticus
Name: Aegean Ground Squirrel
Order: Rodentia
Habitat: Greece and Turkey
Scientific name: Spermophilus citellus
Name: Aegean Mouflon
Order: Artiodactyla
Habitat: Aegean Islands
Scientific name: Ovis orientalis
Name: Aegean Seal
Order: Carnivora
Habitat: Aegean Sea
Scientific name: Monachus monachus
Name: Aequidens Tetra
Order: Perciformes
Habitat: Amazon Basin
Scientific name: Aequidens tetramerus
Name: Afghan Pika
Order: Lagomorpha
Habitat: Afghanistan
Scientific name: Ochotona rufescens
Name: Afghani Urial
Order: Artiodactyla
Habitat: Afghanistan
Scientific name: Ovis vignei
Name: African Bushbaby
Order: Primates
Habitat: Sub-Saharan Africa
Scientific name: Galago senegalensis
Name: African Civet
Order: Carnivora
Habitat: Forests and savannas in sub-Saharan Africa
Scientific name: Civettictis civetta
Name: African Dassie Rat
Order: Rodentia
Habitat: Southern Africa
Scientific name: Petromus typicus
Name: African Dwarf Mongoose
Order: Carnivora
Habitat: Sub-Saharan Africa
Scientific name: Helogale parvula
Name: African Elephant
Order: Proboscidea
Habitat: Savannas and forests in Africa
Scientific name: Loxodonta africana
Name: African Forest Elephant
Order: Proboscidea
Habitat: Forests in central and west Africa
Scientific name: Loxodonta cyclotis
Name: African Golden Cat
Order: Carnivora
Habitat: Forests in central and west Africa
Scientific name: Caracal aurata
Name: African Hedgehog
Order: Eulipotyphla
Habitat: Savannas and grasslands in Africa
Scientific name: Atelerix albiventris
Name: African Lion
Order: Carnivora
Habitat: Savannas and grasslands in Africa
Scientific name: Panthera leo
Name: African Palm Civet
Order: Carnivora
Habitat: Central and West Africa
Scientific name: Nandinia binotata
Name: African Pygmy Hedgehog
Order: Erinaceomorpha
Habitat: Sub-Saharan Africa
Scientific name: Atelerix albiventris
Name: African Pygmy Mouse
Order: Rodentia
Habitat: Sub-Saharan Africa
Scientific name: Mus minutoides
Name: African Straw-Colored Fruit Bat
Order: Chiroptera
Habitat: Sub-Saharan Africa
Scientific name: Eidolon helvum
Name: African Striped Weasel
Order: Carnivora
Habitat: Forests and grasslands in southern Africa
Scientific name: Poecilogale albinucha
Name: African Wild Dog
Order: Carnivora
Habitat: Savannas and grasslands in Africa
Scientific name: Lycaon pictus
Name: Afrotheria
Order: Afrotheria
Habitat: Sub-Saharan Africa
Scientific name: Various
Name: Agama
Order: Squamata
Habitat: Africa and Asia
Scientific name: Agama agama
Name: Agile Antechinus
Order: Dasyuromorphia
Habitat: Southeastern Australia
Scientific name: Antechinus agilis
Name: Agile Gibbon
Order: Primates
Habitat: Tropical forests in Southeast Asia
Scientific name: Hylobates agilis
Name: Agouti
Order: Rodentia
Habitat: Central and South America
Scientific name: Dasyprocta
Name: Aguara Fox
Order: Carnivora
Habitat: South America
Scientific name: Cerdocyon thous
Name: Ai
Order: Pilosa
Habitat: Tropical forests in Central and South America
Scientific name: Bradypus variegatus
Name: Akodon Mouse
Order: Rodentia
Habitat: South America
Scientific name: Akodon
Name: Alaotra Gentle Lemur
Order: Primates
Habitat: Madagascar
Scientific name: Hapalemur alaotrensis
Name: Alaotran Gentle Lemur
Order: Primates
Habitat: Madagascar
Scientific name: Hapalemur alaotrensis
Name: Alaska Moose
Order: Artiodactyla
Habitat: Boreal forests in Alaska and western Canada
Scientific name: Alces alces gigas
Name: Alaskan Moose
Order: Artiodactyla
Habitat: North America
Scientific name: Alces alces gigas
Name: Albino Gorilla
Order: Primates
Habitat: Central Africa
Scientific name: Gorilla gorilla
Name: Albino Kangaroo Rat
Order: Rodentia
Habitat: Southwestern United States
Scientific name: Dipodomys albinus
Name: Aldabra Shrew
Order: Soricomorpha
Habitat: Aldabra Atoll
Scientific name: Suncus megalurus
Name: Alder Shrew
Order: Eulipotyphla
Habitat: North America
Scientific name: Sorex alni
Name: Allen's Galago
Order: Primates
Habitat: Central Africa
Scientific name: Galago alleni
Name: Allen's Hummingbird
Order: Aves
Habitat: Western North America
Scientific name: Selasphorus sasin
Name: Allen's Swamp Monkey
Order: Primates
Habitat: Swamp forests in central Africa
Scientific name: Allenopithecus nigroviridis
Name: Allison's Striped Possum
Order: Diprotodontia
Habitat: New Guinea
Scientific name: Dactylopsila trivirgata
Name: Alpine Dhole
Order: Carnivora
Habitat: Central Asia
Scientific name: Cuon alpinus
Name: Alpine Musk Deer
Order: Artiodactyla
Habitat: Alpine meadows in central Asia
Scientific name: Moschus chrysogaster
Name: Alpine Shrew
Order: Eulipotyphla
Habitat: Europe
Scientific name: Sorex alpinus
Name: Amami Rabbit
Order: Lagomorpha
Habitat: Amami Oshima Island (Japan)
Scientific name: Pentalagus furnessi
Name: Amazon Dolphin
Order: Cetacea
Habitat: Amazon River basin
Scientific name: Inia geoffrensis
Name: Amazon River Dolphin
Order: Cetacea
Habitat: Freshwater rivers in the Amazon basin
Scientific name: Inia geoffrensis
Name: Amoy Bamboo Rat
Order: Rodentia
Habitat: China
Scientific name: Rhizomys sinensis
Name: Amu Darya Vole
Order: Rodentia
Habitat: Central Asia
Scientific name: Microtus transcaspicus
Name: Amur Hedgehog
Order: Erinaceomorpha
Habitat: Northeastern China and Russian Far East
Scientific name: Mesechinus dauuricus
Name: Amur Leopard
Order: Carnivora
Habitat: Temperate forests in northeast Asia
Scientific name: Panthera pardus orientalis
Name: Amur Tiger
Order: Carnivora
Habitat: Temperate forests in northeast Asia
Scientific name: Panthera tigris altaica
Name: Andean Cat
Order: Carnivora
Habitat: Andes Mountains
Scientific name: Leopardus jacobita
Name: Andean Fox
Order: Carnivora
Habitat: Andes Mountains
Scientific name: Lycalopex culpaeus
Name: Angelina's Flying Squirrel
Order: Rodentia
Habitat: Philippine Islands
Scientific name: Hylopetes angelinae
Name: Angolan Colobus
Order: Primates
Habitat: Forests in Angola and the Democratic Republic of the Congo
Scientific name: Colobus angolensis
Name: Angolan Genet
Order: Carnivora
Habitat: Angola
Scientific name: Genetta angolensis
Name: Angora Rabbit
Order: Lagomorpha
Habitat: Worldwide (domesticated)
Scientific name: Oryctolagus cuniculus
Name: Angwantibo
Order: Primates
Habitat: Central Africa
Scientific name: Arctocebus calabarensis
Name: Annamite Striped Rabbit
Order: Lagomorpha
Habitat: Annamite Mountains (Vietnam)
Scientific name: Nesolagus timminsi
Name: Anoa
Order: Artiodactyla
Habitat: Sulawesi (Indonesia)
Scientific name: Bubalus depressicornis
Name: Antaresia
Order: Squamata
Habitat: Australia
Scientific name: Antaresia spp.
Name: Anteater Mouse
Order: Rodentia
Habitat: Philippines
Scientific name: Chrotomys whiteheadi
Name: Antelope Ground Squirrel
Order: Rodentia
Habitat: Deserts and arid regions in western North America
Scientific name: Ammospermophilus leucurus
Name: Antillean Cave Rat
Order: Rodentia
Habitat: Caribbean islands
Scientific name: Corner
Name: Antillean Hutia
Order: Rodentia
Habitat: Hispaniola
Scientific name: Plagiodontia aedium
Name: Antillean Manatee
Order: Sirenia
Habitat: Coastal waters in the Caribbean
Scientific name: Trichechus manatus manatus
Name: Aonyx Otter
Order: Carnivora
Habitat: Sub-Saharan Africa
Scientific name: Aonyx capensis
Name: Apennine Brown Bear
Order: Carnivora
Habitat: Apennine Mountains of Italy
Scientific name: Ursus arctos marsicanus
Name: Appalachian Cottontail
Order: Lagomorpha
Habitat: Appalachian Mountains (North America)
Scientific name: Sylvilagus obscurus
Name: Arabian Oryx
Order: Artiodactyla
Habitat: Deserts in the Arabian Peninsula
Scientific name: Oryx leucoryx
Name: Arakan Forest Turtle
Order: Testudines
Habitat: Myanmar
Scientific name: Heosemys depressa
Name: Arctic Fox
Order: Carnivora
Habitat: Tundra and Arctic regions of the Northern Hemisphere
Scientific name: Vulpes lagopus
Name: Arctic Ground Squirrel
Order: Rodentia
Habitat: Tundra and alpine regions of North America and Asia
Scientific name: Urocitellus parryii
Name: Arctic Hare
Order: Lagomorpha
Habitat: Tundra and Arctic regions of North America and Greenland
Scientific name: Lepus arcticus
Name: Arctic Lemming
Order: Rodentia
Habitat: Arctic regions
Scientific name: Dicrostonyx torquatus
Name: Arctic Wolf
Order: Carnivora
Habitat: Tundra and Arctic regions of North America and Greenland
Scientific name: Canis lupus arctos
Name: Arfak Glider
Order: Phalangeriformes
Habitat: Arfak Mountains of Indonesia
Scientific name: Petaurus arfakensis
Name: Argali
Order: Artiodactyla
Habitat: Mountainous regions of Central Asia
Scientific name: Ovis ammon
Name: Arnhem Rock-Rat
Order: Rodentia
Habitat: Northern Australia
Scientific name: Zyzomys maini
Name: Asian Black Bear
Order: Carnivora
Habitat: Eastern and Southeastern Asia
Scientific name: Ursus thibetanus
Name: Asian Elephant
Order: Proboscidea
Habitat: Asia
Scientific name: Elephas maximus
Name: Asian Golden Cat
Order: Carnivora
Habitat: Asia
Scientific name: Catopuma temminckii
Name: Asian House Shrew
Order: Soricomorpha
Habitat: Asia
Scientific name: Suncus murinus
Name: Asian Palm Civet
Order: Carnivora
Habitat: Asia
Scientific name: Paradoxurus hermaphroditus
Name: Asiatic Black Bear
Order: Carnivora
Habitat: Temperate forests in East and Southeast Asia
Scientific name: Ursus thibetanus
Name: Asiatic Black Rabbit
Order: Lagomorpha
Habitat: Amami Oshima Island (Japan)
Scientific name: Pentalagus furnessi
Name: Asiatic Cheetah
Order: Carnivora
Habitat: Central Asia
Scientific name: Acinonyx jubatus venaticus
Name: Asiatic Golden Cat
Order: Carnivora
Habitat: Asia
Scientific name: Catopuma temminckii
Name: Asiatic Houbara
Order: Gruiformes
Habitat: Central Asia
Scientific name: Chlamydotis macqueenii
Name: Asiatic Lion
Order: Carnivora
Habitat: India
Scientific name: Panthera leo persica
Name: Asiatic Mouflon
Order: Artiodactyla
Habitat: Central Asia
Scientific name: Ovis orientalis
Name: Asiatic Wild Ass
Order: Perissodactyla
Habitat: Central Asia
Scientific name: Equus hemionus
Name: Atalanta Pygmy Mouse
Order: Rodentia
Habitat: Central America
Scientific name: Baiomys taylor
Name: Atlai Argali
Order: Artiodactyla
Habitat: Central Asia
Scientific name: Ovis ammon ammon
Name: Atlai Taar
Order: Artiodactyla
Habitat: Mountainous regions of Central Asia
Scientific name: Capricornis sumatraensis
Name: Attenborough's Echidna
Order: Monotremata
Habitat: New Guinea
Scientific name: Zaglossus attenboroughi
Name: Attwaters Prairie Chicken
Order: Galliformes
Habitat: Texas (USA)
Scientific name: Tympanuchus cupido attwateri
Name: Auldric's Dormouse
Order: Rodentia
Habitat: Africa
Scientific name: Graphiurus arenarius
Name: Aurochs
Order: Artiodactyla
Habitat: Extinct
Scientific name: Bos primigenius
Name: Auyan Toad-Headed Agama
Order: Squamata
Habitat: China
Scientific name: Phrynocephalus ayuwanensis
Name: Avahi
Order: Primates
Habitat: Madagascar
Scientific name: Avahi
| Name | Order | Habitat | Scientific name |
|---|---|---|---|
| Aardvark | Tubulidentata | Savannas and grasslands in Africa | Orycteropus afer |
| Aardwolf | Carnivora | Savannas and grasslands in Africa | Proteles cristata |
| Abaco Island Raccoon | Carnivora | Bahamas | Procyon lotor |
| Abaco Parrot | Carnivora | The Bahamas | Amazona leucocephala bahamensis |
| Abaco Woodrat | Rodentia | Bahamas | Neotoma abbotti |
| Abaggar Gazelle | Artiodactyla | North Africa | Gazella cuvieri |
| Aberdare Colobus | Primates | Kenya | Colobus guereza caudatus |
| Abert's Squirrel | Rodentia | Southwestern United States and Mexico | Sciurus aberti |
| Abo Gazelle | Artiodactyla | Sudan | Gazella dorcas abae |
| Abyssinian Clawless Otter | Carnivora | Ethiopia | Aonyx capensis meneliki |
| Abyssinian Gazelle | Artiodactyla | Ethiopia | Eudorcas tilonura |
| Abyssinian Genet | Carnivora | Ethiopia | Genetta abyssinica |
| Abyssinian Ground Hornbill | Aves | Ethiopia | Bucorvus abyssinicus |
| Abyssinian Hare | Lagomorpha | Grasslands and scrublands in northeast Africa | Lepus habessinicus |
| Acadian Pocket Mouse | Rodentia | Eastern Canada and Northeastern United States | Perognathus flavescens |
| Acadian Pygmy Shrew | Eulipotyphla | North America | Sorex hoyi |
| Acadian Red Bat | Chiroptera | Northeastern North America | Lasiurus borealis acadicus |
| Acari Mountain Cave Rat | Rodentia | Central Asia | Karnimata araxis |
| Acornworm | Chordata | Gulf of Mexico | Bascanichthys scuticaris |
| Acrobat Mouse | Rodentia | Southeast Asia | Paraspini saurus |
| Addax | Artiodactyla | Desert and semi-desert in North Africa | Addax nasomaculatus |
| Addo Elephant | Proboscidea | South Africa | Loxodonta africana addonensis |
| Addra Gazelle | Artiodactyla | North Africa | Nanger dama |
| Adi Goral | Artiodactyla | Northeastern India and Myanmar | Naemorhedus baileyi |
| Admiralty Wallaby | Diprotodontia | New Guinea | Petrogale penicillata |
| Aegean Dolphin | Cetacea | Greece | Delphinus delphis ponticus |
| Aegean Ground Squirrel | Rodentia | Greece and Turkey | Spermophilus citellus |
| Aegean Mouflon | Artiodactyla | Aegean Islands | Ovis orientalis |
| Aegean Seal | Carnivora | Aegean Sea | Monachus monachus |
| Aequidens Tetra | Perciformes | Amazon Basin | Aequidens tetramerus |
| Afghan Pika | Lagomorpha | Afghanistan | Ochotona rufescens |
| Afghani Urial | Artiodactyla | Afghanistan | Ovis vignei |
| African Bushbaby | Primates | Sub-Saharan Africa | Galago senegalensis |
| African Civet | Carnivora | Forests and savannas in sub-Saharan Africa | Civettictis civetta |
| African Dassie Rat | Rodentia | Southern Africa | Petromus typicus |
| African Dwarf Mongoose | Carnivora | Sub-Saharan Africa | Helogale parvula |
| African Elephant | Proboscidea | Savannas and forests in Africa | Loxodonta africana |
| African Forest Elephant | Proboscidea | Forests in central and west Africa | Loxodonta cyclotis |
| African Golden Cat | Carnivora | Forests in central and west Africa | Caracal aurata |
| African Hedgehog | Eulipotyphla | Savannas and grasslands in Africa | Atelerix albiventris |
| African Lion | Carnivora | Savannas and grasslands in Africa | Panthera leo |
| African Palm Civet | Carnivora | Central and West Africa | Nandinia binotata |
| African Pygmy Hedgehog | Erinaceomorpha | Sub-Saharan Africa | Atelerix albiventris |
| African Pygmy Mouse | Rodentia | Sub-Saharan Africa | Mus minutoides |
| African Straw-Colored Fruit Bat | Chiroptera | Sub-Saharan Africa | Eidolon helvum |
| African Striped Weasel | Carnivora | Forests and grasslands in southern Africa | Poecilogale albinucha |
| African Wild Dog | Carnivora | Savannas and grasslands in Africa | Lycaon pictus |
| Afrotheria | Afrotheria | Sub-Saharan Africa | Various |
| Agama | Squamata | Africa and Asia | Agama agama |
| Agile Antechinus | Dasyuromorphia | Southeastern Australia | Antechinus agilis |
| Agile Gibbon | Primates | Tropical forests in Southeast Asia | Hylobates agilis |
| Agouti | Rodentia | Central and South America | Dasyprocta |
| Aguara Fox | Carnivora | South America | Cerdocyon thous |
| Ai | Pilosa | Tropical forests in Central and South America | Bradypus variegatus |
| Akodon Mouse | Rodentia | South America | Akodon |
| Alaotra Gentle Lemur | Primates | Madagascar | Hapalemur alaotrensis |
| Alaotran Gentle Lemur | Primates | Madagascar | Hapalemur alaotrensis |
| Alaska Moose | Artiodactyla | Boreal forests in Alaska and western Canada | Alces alces gigas |
| Alaskan Moose | Artiodactyla | North America | Alces alces gigas |
| Albino Gorilla | Primates | Central Africa | Gorilla gorilla |
| Albino Kangaroo Rat | Rodentia | Southwestern United States | Dipodomys albinus |
| Aldabra Shrew | Soricomorpha | Aldabra Atoll | Suncus megalurus |
| Alder Shrew | Eulipotyphla | North America | Sorex alni |
| Allen's Galago | Primates | Central Africa | Galago alleni |
| Allen's Hummingbird | Aves | Western North America | Selasphorus sasin |
| Allen's Swamp Monkey | Primates | Swamp forests in central Africa | Allenopithecus nigroviridis |
| Allison's Striped Possum | Diprotodontia | New Guinea | Dactylopsila trivirgata |
| Alpine Dhole | Carnivora | Central Asia | Cuon alpinus |
| Alpine Musk Deer | Artiodactyla | Alpine meadows in central Asia | Moschus chrysogaster |
| Alpine Shrew | Eulipotyphla | Europe | Sorex alpinus |
| Amami Rabbit | Lagomorpha | Amami Oshima Island (Japan) | Pentalagus furnessi |
| Amazon Dolphin | Cetacea | Amazon River basin | Inia geoffrensis |
| Amazon River Dolphin | Cetacea | Freshwater rivers in the Amazon basin | Inia geoffrensis |
| Amoy Bamboo Rat | Rodentia | China | Rhizomys sinensis |
| Amu Darya Vole | Rodentia | Central Asia | Microtus transcaspicus |
| Amur Hedgehog | Erinaceomorpha | Northeastern China and Russian Far East | Mesechinus dauuricus |
| Amur Leopard | Carnivora | Temperate forests in northeast Asia | Panthera pardus orientalis |
| Amur Tiger | Carnivora | Temperate forests in northeast Asia | Panthera tigris altaica |
| Andean Cat | Carnivora | Andes Mountains | Leopardus jacobita |
| Andean Fox | Carnivora | Andes Mountains | Lycalopex culpaeus |
| Angelina's Flying Squirrel | Rodentia | Philippine Islands | Hylopetes angelinae |
| Angolan Colobus | Primates | Forests in Angola and the Democratic Republic of the Congo | Colobus angolensis |
| Angolan Genet | Carnivora | Angola | Genetta angolensis |
| Angora Rabbit | Lagomorpha | Worldwide (domesticated) | Oryctolagus cuniculus |
| Angwantibo | Primates | Central Africa | Arctocebus calabarensis |
| Annamite Striped Rabbit | Lagomorpha | Annamite Mountains (Vietnam) | Nesolagus timminsi |
| Anoa | Artiodactyla | Sulawesi (Indonesia) | Bubalus depressicornis |
| Antaresia | Squamata | Australia | Antaresia spp. |
| Anteater Mouse | Rodentia | Philippines | Chrotomys whiteheadi |
| Antelope Ground Squirrel | Rodentia | Deserts and arid regions in western North America | Ammospermophilus leucurus |
| Antillean Cave Rat | Rodentia | Caribbean islands | Corner |
| Antillean Hutia | Rodentia | Hispaniola | Plagiodontia aedium |
| Antillean Manatee | Sirenia | Coastal waters in the Caribbean | Trichechus manatus manatus |
| Aonyx Otter | Carnivora | Sub-Saharan Africa | Aonyx capensis |
| Apennine Brown Bear | Carnivora | Apennine Mountains of Italy | Ursus arctos marsicanus |
| Appalachian Cottontail | Lagomorpha | Appalachian Mountains (North America) | Sylvilagus obscurus |
| Arabian Oryx | Artiodactyla | Deserts in the Arabian Peninsula | Oryx leucoryx |
| Arakan Forest Turtle | Testudines | Myanmar | Heosemys depressa |
| Arctic Fox | Carnivora | Tundra and Arctic regions of the Northern Hemisphere | Vulpes lagopus |
| Arctic Ground Squirrel | Rodentia | Tundra and alpine regions of North America and Asia | Urocitellus parryii |
| Arctic Hare | Lagomorpha | Tundra and Arctic regions of North America and Greenland | Lepus arcticus |
| Arctic Lemming | Rodentia | Arctic regions | Dicrostonyx torquatus |
| Arctic Wolf | Carnivora | Tundra and Arctic regions of North America and Greenland | Canis lupus arctos |
| Arfak Glider | Phalangeriformes | Arfak Mountains of Indonesia | Petaurus arfakensis |
| Argali | Artiodactyla | Mountainous regions of Central Asia | Ovis ammon |
| Arnhem Rock-Rat | Rodentia | Northern Australia | Zyzomys maini |
| Asian Black Bear | Carnivora | Eastern and Southeastern Asia | Ursus thibetanus |
| Asian Elephant | Proboscidea | Asia | Elephas maximus |
| Asian Golden Cat | Carnivora | Asia | Catopuma temminckii |
| Asian House Shrew | Soricomorpha | Asia | Suncus murinus |
| Asian Palm Civet | Carnivora | Asia | Paradoxurus hermaphroditus |
| Asiatic Black Bear | Carnivora | Temperate forests in East and Southeast Asia | Ursus thibetanus |
| Asiatic Black Rabbit | Lagomorpha | Amami Oshima Island (Japan) | Pentalagus furnessi |
| Asiatic Cheetah | Carnivora | Central Asia | Acinonyx jubatus venaticus |
| Asiatic Golden Cat | Carnivora | Asia | Catopuma temminckii |
| Asiatic Houbara | Gruiformes | Central Asia | Chlamydotis macqueenii |
| Asiatic Lion | Carnivora | India | Panthera leo persica |
| Asiatic Mouflon | Artiodactyla | Central Asia | Ovis orientalis |
| Asiatic Wild Ass | Perissodactyla | Central Asia | Equus hemionus |
| Atalanta Pygmy Mouse | Rodentia | Central America | Baiomys taylor |
| Atlai Argali | Artiodactyla | Central Asia | Ovis ammon ammon |
| Atlai Taar | Artiodactyla | Mountainous regions of Central Asia | Capricornis sumatraensis |
| Attenborough's Echidna | Monotremata | New Guinea | Zaglossus attenboroughi |
| Attwaters Prairie Chicken | Galliformes | Texas (USA) | Tympanuchus cupido attwateri |
| Auldric's Dormouse | Rodentia | Africa | Graphiurus arenarius |
| Aurochs | Artiodactyla | Extinct | Bos primigenius |
| Auyan Toad-Headed Agama | Squamata | China | Phrynocephalus ayuwanensis |
| Avahi | Primates | Madagascar | Avahi |