Taxidermy: Dall Sheep (Ovis dalli), circa late 20th century, a large high-quality full mount ram, with head turning slightly to the left, stood upon a faux rock work base, overall length 160cm, overall height 140cm

The Dall sheep, also known as the Thinhorn sheep (Ovis dalli) is a species of wild sheep native to northwestern North America, ranging from white to slate brown in colour and having curved, yellowish-brown horns. The two subspecies are the nominate Dall sheep or Dall's sheep and the more southern subspecies, Stone sheep, which is a slate brown with some white patches on the rump and inside the hind legs.