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When it comes to rabbits, we always think of their long ears. But do you know they have such long ears?
With their long ears, rabbits can sounds from up to three kilometers away. Most rabbits can move their ears in two different directions. Each ear can turn up to 270 degrees. This them to hear the sounds from all directions. For , when they hear the sounds of a wolf coming, the rabbits can run away.
Another reason why rabbits have long ears is for controlling body temperature. Rabbits have many blood vessels (血管) in their long . When a rabbit feels hot the blood vessels will become greater size. This allows more blood to move to its ears. As air blows over, it makes the blood cool down. Then the cool blood moves to other parts of the body it feels comfortable. However, less blood moves to the rabbit's ears on days. This helps to keep the heat.
