Ariola coelisigna 
Ariolica lineolata 
Arion distinctus 
Arion hortensis 
Arisaema filiforme 
Arisaema serratum 
Arisarum simorrhinum 
Aristaria nigrifrons 
Aristea madagascariensis 
Aristobia horridula 
Aristolochia bottae 
Aristolochia fontanesii 
Aristolochia indica 
Aristolochia paucinervis 
Aristolochia scabridula 
Aristotelia pudibundella 
Aristotle's Duke 
Arizona bark scorpion 
Arizona Bird-dropping Moth 
Arizona Black Rattlesnake 
Arizona gray squirrel 
Arizona lupine 
Arizona Mariposa Lily 
Arizona Mud Turtle