Aardvark
Aardwolf
Abyssinian
Abyssinian Guinea Pig
Acadian Flycatcher
Achrioptera Manga
Ackie Monitor
Addax
Adélie Penguin
Admiral Butterfly
Aesculapian Snake
Affenpinscher
Afghan Hound
African Bullfrog
African Bush Elephant
African Civet
African Clawed Frog
African Elephant
African Fish Eagle
African Forest Elephant
African Golden Cat
African Grey Parrot
African Jacana
African Palm Civet
African Penguin
African Sugarcane Borer
African Tree Toad
African Wild Dog
Africanized bee (killer bee)
Agama Lizard
Agkistrodon Contortrix
Agouti
Aidi
Ainu
Airedale Terrier
Airedoodle
Akbash
Akita
Akita Shepherd
Alabai (Central Asian Shepherd)
Alaskan Husky
Alaskan Klee Kai
Alaskan Malamute
Alaskan Pollock
Alaskan Shepherd
Albacore Tuna
Albatross
Albertonectes
Albino (Amelanistic) Corn Snake
Aldabra Giant Tortoise
Alligator Gar
Allosaurus
Allosaurus
Alpaca
Alpine Dachsbracke
Alpine Goat
Alusky
Amano Shrimp
Amargasaurus
Amazon Parrot
Amazon River Dolphin (Pink Dolphin)
Amazon Tree Boa
Amazonian Royal Flycatcher
Amberjack
Ambrosia Beetle
American Alligator
American Alsatian
American Bulldog
American Bully
American Cocker Spaniel
American Cockroach
American Coonhound
American Dog Tick
American Eel
American Eskimo Dog
American Foxhound
American Hairless Terrier
American Leopard Hound
American Paddlefish
American Pit Bull Terrier
American Pugabull
American Pygmy Goat
American Robin
American Staffordshire Terrier
American Toad
American Water Spaniel
American Wirehair
Amethystine Python (Scrub Python)
Amphicoelias Fragillimus
Amur Leopard
Anaconda
Anatolian Shepherd Dog
Anchovies
Andrewsarchus
Angelfish
Angelshark
Angled Sunbeam Caterpillar
Anglerfish
Angora Ferret
Angora Goat
Anhinga
Anna’s Hummingbird
Anole Lizard
Anomalocaris
Ant
Antarctic Scale Worm
Anteater
Antelope
Anteosaurus
Antiguan Racer Snake
Aoudad Sheep
Ape
Apennine Wolf
Appenzeller Dog
Apple Head Chihuahua
Apple Moth
Arabian Cobra
Arabian Wolf
Arafura File Snake
Arambourgiania
Arapaima
Archaeoindris
Archaeopteryx
Archaeotherium
Archelon Turtle
Archerfish
Arctic Char
Arctic Fox
Arctic Hare
Arctic Wolf
Arctodus
Arctotherium
Argentavis Magnificens
Argentine Black and White Tegu
Argentine Horned Frog
Argentinosaurus
Arizona Bark Scorpion
Arizona Black Rattlesnake
Arizona Blonde Tarantula
Arizona Coral Snake
Armadillo
Armadillo Lizard
Armenian Gampr
Armored Catfish
Armyworm
Arsinoitherium
Arthropleura
Aruba Rattlesnake
Ashy Mining Bee
Asian Arowana
Asian Carp
Asian Cockroach
Asian Elephant
Asian Giant Hornet
Asian Lady Beetle
Asian Longhorn Beetle
Asian Palm Civet
Asian Vine Snake
Asian Water Monitor
Asiatic Black Bear
Asp
Asp Caterpillar
Assassin Bug
Assassin Snail
Atlantic Cod
Atlantic Salmon
Atlantic Sturgeon
Atlas Beetle
Atlas Moth
Aurochs
Aussiedoodle
Aussiedor
Aussiepom
Australian Bulldog
Australian Cattle Dog
Australian Cockroach
Australian Firehawk
Australian Flathead Perch
Australian Gecko
Australian Kelpie Dog
Australian Labradoodle
Australian Mist
Australian Retriever
Australian Shepherd
Australian Shepherd Mix
Australian Terrier
Australopithecus
Australorp Chicken
Avocet
Axanthic Ball Python
Axolotl
Ayam Cemani
Aye-aye
Azawakh