Pocket Gopher

Photo by Marty Horowitz 6/21/2014

You rarely see these cuties, but there's lots of evidence of their presence - in Sabino Canyon and on Mt Lemmon (where the photo above was taken). From the Firefly Forest site:

Botta's Pocket Gophers and other Pocket Gophers leave a fan-shaped dirt mound in front of their burrows, and the burrow entrances are usually kept securely closed up with dirt. Even though they live in areas with many others of their own kind nearby, Botta's Pocket Gophers are solitary and territorial, and they will fight any other gopher that dares invade their burrow.

 Keep out!