Wild Wonders of Europe / Arndt / Mouflon (Ovis musimon) male on rock look out, Parc naturel regional du Haut-Languedoc, Caroux, France, July 2009

Jack Dykinga / Bighorm sheep (Ovis canadensis) males grouped together before the rutting season. Valley of Fire State Park, Nevada, USA, February.

David Woodfall / Cheviot sheep grazing eroding machair at front of sand dunes, North Uist, Scotland, UK, June.

Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram, Montana

Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram, Montana

Donald M. Jones / Bighorn Sheep (Ovis canadensis) female and male in winter, Jasper National Park, Alberta, Canada

Donald M. Jones / Bighorn Sheep (Ovis canadensis) females in winter, Jasper National Park, Alberta, Canada

Philippe Clement / Shetland sheep ruminating on sea cliff, Hermaness NNR, Unst, Shetland Islands, Scotland, UK, May.

Donald M. Jones / Minden / Bighorn Sheep (Ovis canadensis) ram, western Canada

Guy Edwardes / Pilsdon Pen and Marshwood Vale in morning mist, Quarr Hill, Dorset, England, UK. May 2014.

Dave Bevan / Welsh mountain sheep cleaning afterbirth from a lamb before a second lamb is born, Carmarthenshire, Wales, UK, March.

Donald M. Jones / Dall's Sheep (Ovis dalli) ram, Denali National Park, Alaska