Araguaian river dolphin 
Araneus ginninderranus 
Araneus nox 
Araneus pallidus 
Araneus pentagrammicus 
Araneus psittacinus 
Arboreal Bicolored Ant 
Arboreal salamander 
Arborescent pricklypear 
Arborvitae Leafminer 
Arc-eye hawkfish 
Arcfin Shrimpgoby 
Arch Duke Butterfly 
Archaeoattacus edwardsii 
Archaeoattacus malayanus 
Archaeoses polygrapha 
Archaereta dorsivittella 
Archarius crux 
Archarius pyrrhoceras 
Archarius salicivorus 
Archasia belfragei 
Archbolds newtonia 
Archduke 
Archduke Butterfly