Ovis canadensis
Rams - 5 to 6 feet long Ewes - 4 to 5 feet long
Generally a pale tan in the desert regions
Most people do not associate Bighorn sheep with the desert but in certain regions, the sheep still inhabit the rocky ridges. They shy away from people and the few chance encounters are generally brief. The rams have large brown horns that curl up, back, and around the head.
The Bighorns tend to be out during the day and as with many such species they will roam from the early morning hours until into the evenings. I have seen Bighorns in a variety of places including the rocky Marble Mountains in southern California and the Black Mountains west of Kingman, AZ. Sometimes in the cool of the mornings they can be spotted jumping from ledge to ledge high up in remote hillsides. At other times, they may be seen apparently "frozen" on a remote mountainside.
There are several groups of people who have been working towards reintroducing the Bighorns to mountain ranges that they once inhabited. The reintroduction includes establishing watering holes for them and giving some minimal protection to their new habitats.
Reference: Deserts, An Audubon Society Nature Guide