Rock art lizard. 

I spotted this Clark’s spiny lizard (Sceloporus clarkii) climbing on a petroglyph panel at Picture Rocks. The dark crossbars on its forelimbs are diagnostic. I have read a description that calls the bands “bracelet-like,” but to me they look like the sleeves of a very itchy, very scaly sweater.   

Picture Rocks petroglyph site, at the Redemptorist Renewal Center, Tucson, Arizona.

The rock art here was made by Hohokam people, with panels  dominated by animal and anthropomorphic forms. Some figures are currently thought to be solstice markers.  The retreat center welcomes visitors who want to see the glyphs, but requests check-in at the office before exploring the site.