Big Horn Sheep

This is a Big Horn Sheep glyph near Arlington, Arizona. It's on an east facing boulder near where the Gila River would have flowed before agriculture dried it up. Gillespie Dam is visible from this site. The dam was breached in the early nineties and never repaired. There's plenty of standing water there, making the area look like a large lake.
This type of zoomorph is pretty common among glyphs in southern Arizona. Big Horn Sheep likely were a staple in the diet of the people that populated the area. Maybe the purpose of the glyph is to mark a kill site, or act as an indicater that Big Horn Sheep could be found nearby.
This glyph is unique because it is very large. I didn't think to insert anything into the picture that would give us a scale or perspective. Based on my recollection, I estimate it to be a foot and a half across. Not very scientific, I know. When the weather cools down I'll probably go back out and take the pic again, this time with a ruler in hand!