A rabbit’s ears serve two key functions. First – and obviously – they help the animal to monitor its environment and detect predators.
Rabbits can pick up sounds over considerable distances, maybe even up to 3km. Their ears can be rotated 270 degrees to help detect the source of a sound, and can revolve independently to monitor different noises.
The second is, they give off heat from the body through a vast network of blood vessels to keep the bunny cool, since these animals can’t sweat or pant.
However not all rabbits have big ears – some domesticated breeds like the Netherland Dwarf have short ones.