- Common Spiny Agama
Agama hispida
- conanti
Agkistrodon piscivorus
- Olive-brown seasnake
Aipysurus laevis
- Alligator, Gator, American alligator, Florida alligator, Mississippi alligator, Louisiana alligator.
Alligator mississippiensis
- Chinese alligator, T'o, Yow Lung, Yangtze alligator
Alligator sinensis
- Allobates caeruleodactylus
- Flatwoods Salamander
Ambystoma cingulatum
- Northwestern Salamander
Ambystoma gracile
- Eastern Tiger Salamander
Ambystoma tigrinum
- Giant Ameiva, Amazon Racerunner
Ameiva ameiva