- Many animals, particularly mammals and birds, have movable auricles, also known as pinnae, to control their body temperature.
- By moving their auricles, animals can increase or decrease the blood flow to the ears, which helps regulate heat loss and maintain optimal body temperature.
To amplify sounds:
- In some animals, movable auricles function to amplify sounds. The shape and position of the auricles help collect and focus sound waves toward the inner ear, enhancing their hearing abilities and sensitivity to specific sounds.
To communicate and express emotions:
- Movable auricles play a crucial role in communication and expressing emotions in many animals, especially mammals. By moving their ears in different directions, animals can convey various signals, such as alertness, aggression, fear, or playfulness, to other members of their species.
For balance and spatial orientation:
- In certain animals, such as cats, movable auricles assist with balance and spatial orientation. By moving their ears independently, they can determine the direction and distance of sounds, helping them navigate and locate prey or threats.
For protection:
- In some animals, movable auricles provide protection to the ear canal and inner ear. They can close or fold over to block dust, debris, or water entering the ear and potentially causing damage.