This is the Greater Earless Lizard (Cophosaurus texanus). Yes, there is a lesser earless lizard. I didn't think that any lizards had ears, but what they mean is that the lizard lacks ear openings. Spring is an excellent time to go out lizard watching. It is just warm enough to have them come out and bask in the sun and not so hot that they seek shade under the rocks. Depending on the time of year, a walk in the desert can be filled with scurrying lizards or there may not be any out at all.