- Anahaw: A type of palm tree found in the Philippines.
- Aardvark: A burrowing mammal found in Africa.
- Alpaca: A camelid mammal native to South America.
- Alligator: A large reptile found in freshwater habitats in the Americas.
- Anteater: A mammal that feeds on ants and termites, found in Central and South America.
- Ant: A small, social insect that lives in colonies.
- Ape: A large, intelligent primate, including gorillas, chimpanzees, orangutans, and gibbons.
- Armadillo: A small, armored mammal found in the Americas.
- Asian elephant: The largest land animal in Asia, found in India, Nepal, Bhutan, Myanmar, Thailand, Laos, Cambodia, Vietnam, Malaysia, and Indonesia.
- African buffalo: A large, herbivorous mammal found in sub-Saharan Africa.
- Arctic fox: A small, white fox found in the Arctic region.
- Aye-aye: A nocturnal primate found in Madagascar.