24-spot ladybird 
Aardvark 
Aardwolf 
Aaronsohnia factorovskyi 
Abacena accincta 
Abaeis salome jamapa 
Abana horvathi 
Abantiades labyrinthicus 
Abax parallelepipedus 
Abbot's Bagworm Moth 
Abbotswood Cinquefoil 
Abbott's Day Gecko 
Abbreviated Button Slug 
Abdim's stork 
Abdopus aculeatus 
Aberts squirrel 
Abisara geza 
Abisara neavei 
Aborted entoloma 
Abracris flavolineata 
Abraham, Isaac & Jacob 
Abraxas intervacuata 
Abrosoma festinatum 
Abrosoma gibberum