2. Characteristics and functions of pig ears: The large area of pig ears is conducive to heat dissipation and helps pigs adapt to the sultry environment in captivity.
3. The characteristics and functions of cow ears: The ear tag on the cow ear is equivalent to the ID card of the cow, which records a lot of information about the cow, such as pregnancy history, health information, date of birth, food intake, family information, milk production and so on. The staff can control the growth and health of cows through this ear tag.
4. Characteristics and functions of sheep's ears: sheep's ears are pointed and long, and their shapes are similar to ellipses. Sheep's ears have the function of distinguishing vibration, which can convert the sound emitted by vibration into nerve signals and then transmit them to the brain. Giving sheep hearing plays an extremely important role in foraging and avoiding enemies.
5. Features and functions of chicken ears: The chicken ears grow at the lower right of the head, and the ears can hear distant sounds. However, its ears are very smart, with only ear holes and no ear shells.