In winter, they feed on woody or dried vegetation. Sometimes these social animals will feed in groups. Jackrabbits have excellent hearing. Their ears can be 5 inches long. In addition to collecting sound, the large ears serve to disperse some of the animal's body heat on hot days.
Jackrabbits can weigh three to six pounds.
Although they are larger than cottontails, the hind tracks may appear smaller because jackrabbits tend to run on the toes of the hind feet. The long heels do not leave marks when the animal is running like this. The hind feet can be 5 inches long. Jackrabbits rarely walk. They hop five to ten feet at a time.