Common side-blotched lizard (Uta stansburiana ♂), in the Thunderbird Conservation Park in Glendale, Arizona.

This fellow was doing little lizard push-ups on his stone perch – a fearsome territorial display among his kind, but really amusing to me. I could watch for hours.

Please click photo for an enlarged view. 

Common side-blotched lizard (Uta stansburiana ♂), in the Thunderbird Conservation Park in Glendale, Arizona.

This fellow was doing little lizard push-ups on his stone perch – a fearsome territorial display among his kind, but really amusing to me. I could watch for hours.

Please click photo for an enlarged view.