See also: Rocky Mountain sheep
- 1822  We learn on the authority of a gentleman who has traversed the Rocky Mountains from the north branch of the Columbia to the Athapescow that numerous flocks of these sheep inhabit that region.
- 1957  Yet a crew of men . . . had replaced the original habitants of this waste, the sheep and goat, and were boring straight down through the stone spires of the continent to its underlying pool of oil.