“Sunday Morning” takes us among Bighorn sheep along the Salmon River near Riggins, Idaho. Videographer: Hank Heusinkveld.

The bighorn sheep is a species of sheep native to North America. It is named for its large horns. A pair of horns might weigh up to 14 kg; the sheep typically weigh up to 143 kg. Recent genetic testing indicates three distinct subspecies of Ovis canadensis, one of which is endangered: O. c. sierrae.