Jackrabbits - well, all #hares, and all non-lop #rabbits - have great ears. Younger folks won't remember indoor TV aerials affectionately called "rabbit ears", but the name was apt.
Here's a white-tailed jackrabbit - which yes, is actually a hare, not a rabbit - who has his ears up monitoring for threats while he munches some food. They turn to face different directions to focus sound from, like a radar dish, and they both operate independently. I call this "swivel mode".