Notable for its running speed, the Texas Antelope Squirrel has the longest hindlimbs and tail of any antelope squirrel. In the field, the squirrels are noticeable because of the way they carry the tail arched forward over the back. Learn more about the Ammospermophilus interpres, more commonly known as a Texas Antelope Squirrel, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.