Bighorn sheep were introduced into Badlands National Park to replace the sheep species (now extinct) that used to roam the area. I'm pretty sure they used sheep from the Rocky Mountains of Colorado during the introduction; I'm not positive so I don't know what subspecies of sheep these are.
Knew it was around. Hadn't seen it until now.
Bighorn Sheep being chased by a Coyote
The bighorn sheep (Ovis canadensis) is a species of sheep in North America named for its large horns. These horns can weigh up to 30 lb (14 kg), while the sheep themselves weigh up to 300 lb (140 kg). Recent genetic testing indicates three distinct subspecies of Ovis canadensis, one of which is endangered: O. c. sierrae. Sheep originally crossed to North America over the Bering land bridge from Siberia: the population in North America peaked in the millions, and...