Arethusana 
Arfak Astrapia 
Arfak honeyeater 
Arfak Robin 
Arfakiana tree frog 
Arge moth 
Arge similis 
Argentine ant 
Argentine Black and White Tegu 
Argentine Horned Frog 
Argentine Pricklypear 
Argentine Red Tegu 
Argentine Saguaro 
Argentine Senna 
Argentine Toad 
Argentipallium obtusifolium 
Argia limitata 
Argiocnemis ensifera 
Argiope aetheroides 
Argiope intricata 
Argiope pentagona 
Argiope perforata 
Argiope ranomafanensis 
Argiope reinwardti