Charlie Summers / Rocky mountain bighorn (Ovis canadensis) ram jumping a barbed wire fence, Montana, USA,

Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram in alpine zone, northern Rocky Mountains, Canada

Diane McAllister / Female Rocky Mountain bighorn sheep ewe (Ovis canadensis canadensis) warning her newborn lamb that a rocky ledge is too close and dangerous. She places her front hoof on the baby's back, stopping it f...

Charlie Summers / Rocky Mountain Bighorn sheep (Ovis canadensis) female jumping barbed wire fence, Montana, USA

Sumio Harada / Bighorn Sheep (Ovis canadensis) males butting heads to compete for females, Rocky Mountains, North America

Sumio Harada / Bighorn Sheep (Ovis canadensis) males butting heads while a third looks on, Rocky Mountains, North America

Lynn M Stone / Bighorn sheep {Ovis canadensis} Female seeking refuge from male Jasper NP Alberta Canada

Lynn M Stone / Bighorn sheep (Ovis canadensis). Jasper NP, Canada

Nick Garbutt / Rocky mountain bighorn sheep (Ovis canadensis canadensis) grazing. Lamar Valley, Yellowstone National Park, Wyoming, USA. January

Nick Garbutt / Rocky Mountain bighorn sheep (Ovis canadensis canadensis) male grazing. Lamar Valley, Yellowstone National Park, Wyoming, USA. January

Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram digging up shrub in winter, Lamar Valley, Yellowstone National Park, Wyoming

Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram browsing in winter, Lamar Valley, Yellowstone National Park, Wyoming