Arctic redpoll 
Arctic Sand Lance 
Arctic shrew 
Arctic tern 
Arctic wolf 
Areolate grouper 
Arfak Astrapia 
Arfak honeyeater 
Arfak Robin 
Arfakiana tree frog 
Argentine Black and White Tegu 
Argentine Horned Frog 
Argentine Red Tegu 
Argentine Toad 
Argus grouper 
Arizona Black Rattlesnake 
Arizona gray squirrel 
Arizona Mud Turtle 
Arizona Tree Frog 
Armenian gull 
Armored Pricklenape 
Arnold's Fringe-fingered Lizard 
Arothon_stellatus 
Arothron reticularis