Antakarana Leaf Chameleon 
Anteater chat 
Antelope jackrabbit 
Anthonys poison arrow frog 
Anthropogenic Shrub Frog 
Antillean Coqui 
Antillean crested hummingbird 
Antimena chameleon 
Antipodean albatross 
Antongil Velvet Gecko 
Apache trout 
Aphaniotis ornata 
Apical flycatcher 
Aplidium breviventer 
Aplomado falcon 
Apostlebird 
Appert's tetraka 
Apurímac brushfinch 
Apurímac Spinetail 
Aquatic Coral Snake 
Aquatic Garter Snake 
Arabian angelfish 
Arabian Babbler 
Arabian babbler