Animals with visible ears:
- Dogs: Dogs have prominent, visible ears that come in various shapes and sizes depending on the breed. Their ears serve multiple functions, including aiding in hearing and expressing emotions.
- Cats: Cats also have visible ears that can move independently to help them locate sounds and communicate with other cats. Their ears can be upright or folded, depending on the breed.
- Rabbits: Rabbits have long ears that are not only adorable but also serve a practical purpose. Their large ears help them regulate their body temperature and detect predators.
- Elephants: Elephants have large, flappy ears that not only help them hear well but also regulate their body temperature. Their ears are filled with blood vessels that help dissipate heat.

Animals with hidden ears:
- Birds: Many birds have hidden ears located behind their eyes and covered by feathers. These ears are still functional and allow birds to hear well despite not being visible.
- Snakes: Snakes have internal ears that are not visible from the outside. They can detect vibrations and low-frequency sounds through their jawbones, allowing them to sense their surroundings.
- Turtles: Turtles have internal ears as well, located inside their heads. They can still hear vibrations and sounds underwater, even though their ears are not visible.
- Fish: Fish also have hidden ears located internally. They can detect water vibrations and pressure changes to locate prey and avoid predators.