Stone sheep
This sheep is larger than its relative, the Dall sheep.  The adult male stone sheep can weigh 180 to 220 lbs (82 to 100 kg).  The adult female sheep are smaller.  Unlike Dall sheep, stone sheep do not have bright white fur.  Instead, they are gray, brown, or black.  Lighter stone sheep are sometimes called Fannin sheep.  Some scientists think Fannin sheep are a separate subspecies of thinhorn sheep and other scientists do not.