24-spot ladybird 
Abacena accincta 
Abana horvathi 
Abantiades labyrinthicus 
Abax parallelepipedus 
Abbot's Bagworm Moth 
Abbreviated Button Slug 
Abisara geza 
Abisara neavei 
Abracris flavolineata 
Abrosoma festinatum 
Abrosoma gibberum 
Abrupt Epiblema Moth 
Acacia blue 
Acacia shield bug 
Acacus sapuani 
Acadian hairstreak 
Acadian hermit crab 
Acalitus ferrugineum 
Acalymma vinctum 
Acalypta parvula 
Acalyptus carpini 
Acanthagrion lancea 
Acanthocephala terminalis