- Geoffroy's tailless bat
Anoura geoffroyi
- mole shrew
Anourosorex squamipes
- kultarr
Antechinomys laniger
- brown antechinus
Antechinus stuartii
- springbok
Antidorcas marsupialis
- pallid bat
Antrozous pallidus
- lemurine night monkey
Aotus lemurinus
- Ma's night monkey
Aotus nancymaae
- northern night monkey
Aotus trivirgatus
- mountain beaver
Aplodontia rufa
- red tree vole
Arborimus longicaudus
- binturong
Arctictis binturong
- Calabar angwantibo
Arctocebus calabarensis
- Antarctic fur seal
Arctocephalus gazella
- Jamaican fruit-eating bat
Artibeus jamaicensis
