He was holding his territory on top of my backyard fence. You can see the tip of Camelback Mountain in the background.
This lizard is a black collared lizard. It has a fairly large head and get quite big. They saunter to side to side and are not afraid of very much.
I have seen them hold their ground and their territory is quite large. They do push-ups in the sun and they are regularly out in the open. I try to leave sprawling bushes in my yard for these lizards to live under.