Who Do Jackrabbits Have Big Ears?

Hence, the large ears are used for self-preservation. They are able to hear predators before attempting to escape at speeds as fast as 40 mph. In addition, they have other impressive adaptations that make them suitable for an arid environment.

Why do jackrabbits have huge ears?

The most striking feature of all jackrabbits are their long ears. ... They do so because their ears are thin and have an extensive network of blood vessels running through them. When desert temperatures become too hot, the jackrabbit can increase the flow of blood through the ears by dilating its blood vessels.

How does a jack rabbits ears keep it cool?

Jackrabbits live in the desert where they're exposed to extremely hot daytime temperatures, but these animals are able to stay cool by releasing excess heat from their oversized ears.