Jouan Rius / Desert Bighorn sheep (Ovis canadensis) flock, Valley of Fire State Park, Nevada, USA, May.
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Jouan Rius / Desert Bighorn sheep female (Ovis canadensis), Zion National Park, Utah, USA. February
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Connor Stefanison / Rocky mountain bighorn sheep (Ovis canadensis) ram eating grass, Jasper National Park, Alberta, Canada. December.
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Connor Stefanison / Rocky mountain bighorn sheep (Ovis canadensis) lamb leaping across a stream, as the rest of the herd watches, Jasper National Park, Alberta, Canada. December.
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Connor Stefanison / Two young Rocky mountain bighorn sheep (Ovis canadensis) walking along a lakeside hill in Jasper National Park, Alberta, Canada. December.
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Connor Stefanison / Rocky mountain bighorn sheep (Ovis canadensis) ram lying down to rest for night, Jasper National Park, Alberta, Canada. December.
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Connor Stefanison / Rocky mountain bighorn sheep (Ovis canadensis) ram digging through the snow at dusk, Jasper National Park, Alberta, Canada. December.
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Connor Stefanison / Rocky mountain bighorn sheep (Ovis canadensis) ram stands on a lakeside hill just after sunset in Jasper National Park, Alberta, Canada, December.
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Connor Stefanison / Rocky mountain bighorn sheep (Ovis canadensis) ram standing on a rocky hillside at dusk, Jasper National Park, Alberta, Canada. December.
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Connor Stefanison / Rocky mountain bighorn sheep (Ovis canadensis) ram standing on a rocky hillside at dusk, Jasper National Park, Alberta, Canada. December.
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Connor Stefanison / Rocky mountain bighorn sheep (Ovis canadensis) rams standing on mountain slope, Jasper National Park, Alberta, Canada. December.
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Dawn Y. Wilson / Bighorn Sheep (Ovis canadensis) ram flehming, Waterton Canyon, Colorado
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Dawn Y. Wilson / Bighorn Sheep (Ovis canadensis) sub-adult ram, Waterton Canyon, Colorado
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Dawn Y. Wilson / Bighorn Sheep (Ovis canadensis) sub-adult ram, Waterton Canyon, Colorado
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Scott Leslie / Desert Bighorn Sheep (Ovis canadensis nelsoni) mothers and lambs, Valley of Fire State Park, Nevada
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Scott Leslie / Desert Bighorn Sheep (Ovis canadensis nelsoni) mothers and lambs, Valley of Fire State Park, Nevada
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Scott Leslie / Desert Bighorn Sheep (Ovis canadensis nelsoni) mothers and lambs, Valley of Fire State Park, Nevada
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Scott Leslie / Desert Bighorn Sheep (Ovis canadensis nelsoni) lamb, Valley of Fire State Park, Nevada
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Sylvain Cordier / Rocky mountain bighorn sheep (Ovis canadensis canadensis), male walking on rocks, Jasper National Park, Canada
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Sylvain Cordier / Rocky mountain bighorn sheep (Ovis canadensis canadensis) group of males in breeding season, Jasper National Park, Canada
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Sylvain Cordier / Rocky mountain bighorn sheep (Ovis canadensis canadensis) males in breeding season exhibiting flehmen response, Jasper National Park, Canada
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Sylvain Cordier / Rocky mountain bighorn sheep (Ovis canadensis canadensis) males in breeding season exhibiting flehmen response to scent for females on heat, Jasper National Park, Canada
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Sylvain Cordier / Rocky mountain bighorn sheep (Ovis canadensis canadensis) two males head to head during breeding season, Jasper National Park, Canada
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George Sanker / Bighorn sheep (Ovis canadensis) young lamb walking along rock face, Yellowstone National Park, Wyoming, USA.
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George Sanker / Bighorn sheep (Ovis canadensis) lamb at rest, Yellowstone National Park, Wyoming, USA.
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Danny Green / Bighorn sheep (Ovis canadensis) close up ram's head shot, Yellowstone National Park, USA, February
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Danny Green / Bighorn sheep (Ovis canadensis) male ram walking in the snow, Yellowstone National Park, USA, February
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Inaki Relanzon / Ute tribal petrogliphs on a rock illustrating Bighorn sheep, Arches National Park, Utah, USA.
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Steve Gettle / Bighorn Sheep (Ovis canadensis) ram, Yellowstone National Park, Wyoming
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Steve Gettle / Bighorn Sheep (Ovis canadensis) rams, Yellowstone National Park, Wyoming
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Steve Gettle / Bighorn Sheep (Ovis canadensis) ram, Yellowstone National Park, Wyoming
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Steve Gettle / Bighorn Sheep (Ovis canadensis) ram, Yellowstone National Park, Wyoming
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Steve Gettle / Bighorn Sheep (Ovis canadensis) rams grazing, Yellowstone National Park, Wyoming
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Steve Gettle / Bighorn Sheep (Ovis canadensis) ram, Yellowstone National Park, Wyoming
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Steve Gettle / Bighorn Sheep (Ovis canadensis) rams grazing, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Snow Leopard (Panthera uncia) biologist, David Cooper, taking notes on Argali (Ovis ammon) male killed by snow leopard, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) female running, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) female, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) female, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) female, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) female grazing, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) female, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) mother and lamb, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) males, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) females and lambs, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) female, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Sebastian Kennerknecht / Argali (Ovis ammon) female flock, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan
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Nick Garbutt / RF - Rocky Mountain bighorn sheep (Ovis canadensis canadensis) searching for grazing beneath deep snow. Lamar Valley, Yellowstone National Park, Wyoming, USA. January. (This image may be licensed eith...
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Nick Garbutt / Rocky Mountain Bighorn Sheep (Ovis canadensis canadensis) male searching for grazing beneath deep snow. Lamar Valley, Yellowstone National Park, Wyoming, USA. January
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Nick Garbutt / Rocky Mountain Bighorn Sheep (Ovis canadensis canadensis) male sparring / fighting Lamar Valley, Yellowstone National Park, Wyoming, USA. January
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) mother and lamb grazing, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram smelling female to see if she is in heat, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) rams on lawn, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) female and male on lawn, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) rams on lawn, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) herd grazing on lawn, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) rams on lawn, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram chewing, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram chewing, Hemenway Valley Park, Boulder City, Nevada
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Shin Yoshino / Desert Bighorn Sheep (Ovis canadensis nelsoni) rams grazing on lawn, Hemenway Valley Park, Boulder City, Nevada
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Mark Raycroft / Bighorn Sheep (Ovis canadensis) ram, North America
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Mark Raycroft / Bighorn Sheep (Ovis canadensis) ram, North America
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Mark Raycroft / Bighorn Sheep (Ovis canadensis) ram, North America
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Mark Raycroft / Bighorn Sheep (Ovis canadensis) ram, North America
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Sumio Harada / Bighorn Sheep (Ovis canadensis) rams in winter, Glacier National Park, Montana
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Sumio Harada / Bighorn Sheep (Ovis canadensis) rams in spring, Glacier National Park, Montana
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George Sanker / Bighorn Rams (Ovis canadensis) sparring in a high mountain pass in Jasper National Park, Alberta, Canada.
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Jeff Foott / Bighorn Sheep (Ovis canadensis) males running after female, Zion National Park, Utah
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Jeff Foott / Bighorn Sheep (Ovis canadensis) ram, Zion National Park, Utah
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Jeff Foott / Bighorn Sheep (Ovis canadensis) ram, Zion National Park, Utah
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Jeff Foott / Bighorn Sheep (Ovis canadensis) herd, Zion National Park, Utah
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Jeff Foott / Bighorn Sheep (Ovis canadensis) herd, Zion National Park, Utah
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Jeff Vanuga / Bighorn sheep (Ovis canadensis canadensis) ewes, lambs and ram, Whiskey Mountain Bighorn Sheep Range, Dubois, Wyoming, USA, November.
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Jeff Vanuga / Rocky mountain bighorn sheep Rocky mountain bighorn (Ovis canadensis canadensis) ewe with tracking collar for identification. Whiskey Mountain near Dubois, Wyoming, USA, November.
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Kevin Schafer / Bighorn Sheep (Ovis canadensis) ram in winter, Banff National Park, Alberta, Canada
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Donald M. Jones / Desert Bighorn Sheep (Ovis canadensis nelsoni) pictograph, Valley of Fire, Nevada
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Donald M. Jones / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram running, southern Nevada
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Donald M. Jones / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, southern Nevada
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Donald M. Jones / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, southern Nevada
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Donald M. Jones / Desert Bighorn Sheep (Ovis canadensis nelsoni) ram, southern Nevada
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) rams, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ewes, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram flehming, western Montana
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ewe and lambs, western Canada
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) ewe nursing lambs, western Canada
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Donald M. Jones / Bighorn Sheep (Ovis canadensis) rams, western Canada