common chuckwalla (sauromalus ater) camouflaged on a rock.

animal arid ater basking black boulder brown bulky california camouflaged chuckawalla chuckwalla colorado common creature creepy desert diurnal dry falls fauna flatbodied fossil gray harmless iguana iguanian iguanidae large lizard lizards mexico mojave nature northwestern plump portrait profile reptile rock rough sauromalus scales side skin sonoran southwestern states sunbathing tan united view wild wildlife