"In the long shadows jackrabbits bolted and loped and froze again."
Antelope Jackrabbit
Creative Commons Attribution Share AlikeAntelope Jackrabbit - Credit: Nehrams2020
Black-tailed jackrabbit
Creative Commons Attribution Share AlikeBlack-tailed Jackrabbit - Credit: Jim Harper

Despite the name, jackrabbits are actually hares. They are named for their long ears, which initially caused some people to refer to them as jackass rabbits.

The two most likely candidates in the novel are the Black-tailed Jackrabbit, native to the western U.S. and Mexico, and the Antelope Jackrabbit, found in Arizona in the U.S. and the states of Chihuahua, Nayarit, Sinaloa and Sonora in Mexico.