Characteristics of rabbit ears:
1. Rabbit ears are longer and even larger than the length of the head. There are also rabbits with smaller, droopy ears.

2. Rabbit ears can express emotions. When emotions are high, the ears will tilt forward. When they are happy, their ears will stand upright and move from side to side. When they are nervous, their ears will stand upright and stick together.

3. Rabbits will keep swinging their ears when running. The ears can help them maintain balance.

4. Rabbits have particularly keen ears that can receive very low sounds.

The functions of rabbit ears:

1. Rabbits can maintain vigilance through hearing. When there is danger, the rabbit's ears will stand up and they will remain vigilant.

2. The rabbit’s ears can feel the humidity and temperature in the air, and can also help the rabbit regulate its body temperature.

3. Rabbits can also express their different emotions through their ears. When they feel happy, they will swing their ears and head, and look back and forth.

4. Rabbits have no sweat glands and need to use their ears to dissipate heat.