Photographed in Arizona’s Tonto National Forest. Desert bighorn sheep are stocky, heavy-bodied sheep, similar in size to mule deer; and horn size is a symbol of rank among males. Many rams, such as this fellow, break off the ends of their horns (called "brooming"), often during horn clashes with other rams for dominance and breeding-rights, and also as a way to keep the horn from curling so much around, to prevent them from losing crucial peripheral vison and being more susceptible to predation.