The only serious predator of the musk ox, aside from man, is the wolf: when under attack, the herd closes into a tight defensive circle with the calves in the middle, presenting an almost impenetrable ring of sharp curved horns. Arctic Wildlife; www.bradtguides.com.
Alaska Eskimo Native Whale Bone Musk Ox Carving by Chris Aningayou
Bison at Maxwell Game Preserve, Roxbury, Kansas 1981
Charmingly characterised as the 'unicorn of the sea', the striking narwhal is confined to west Greenland and the Canadian arctic. Only males have the distinctive tusk, the longest of which was recorded at 2.7m. Arctic Wildlife; www.bradtguides.com.