Steven Kazlowski / Dall sheep (Ovis dalli) solitary animal at sunset with a storm moving across the sky, Denali National Park, interior Alaska, USA
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Gerrit Vyn / Dall sheep (Ovis dalli) yearling lamb running across alpine tundra, Denali National Park, Alaska, USA
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Gerrit Vyn / Dall sheep (Ovis dalli) rams head butting, one behaviour by which males establish dominance during the Autumn mating season. Denali National Park, Alaska, USA
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Steven Kazlowski / Dall sheep {Ovis Dalli} walking on hillside, Denali National Park, Alaska, USA.
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Steven Kazlowski / Dall sheep {Ovis Dalli}female profile walking on hillside, Denali National Park, Alaska, USA.
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Steven Kazlowski / Dall sheep male resting {Ovis Dalli} Denali National Park, Alaska, USA.
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Matthias Breiter / Dall's Sheep (Ovis dalli) ram portrait on rock outcrop, Denali National Park and Preserve, Alaska
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Matthias Breiter / Dall's Sheep (Ovis dalli) ram with split horn, Denali National Park and Preserve, Alaska
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Donald M. Jones / Dall's Sheep (Ovis dalli) ram, Denali National Park, Alaska
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Michael Quinton / Dall's Sheep (Ovis dalli) ram, lamb, and ewe, Yukon Territory, Canada
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Donald M. Jones / Dall's Sheep (Ovis dalli) rams posturing, central Alaska
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Donald M. Jones / Dall's Sheep (Ovis dalli) rams posturing, central Alaska
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Donald M. Jones / Dall's Sheep (Ovis dalli) rams, Denali National Park, Alaska
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Donald M. Jones / Dall's Sheep (Ovis dalli) rams, Denali National Park, Alaska
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Donald M. Jones / Dall's Sheep (Ovis dalli) ram, central Alaska
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Donald M. Jones / Dall's Sheep (Ovis dalli) bedded ram, central Alaska
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Yva Momatiuk & John Eastcott / Dall's Sheep (Ovis dalli) ram, Denali National Park, Alaska
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Donald M. Jones / Dall's Sheep (Ovis dalli) ram, central Alaska
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Michael Quinton / Dall's Sheep (Ovis dalli) trio resting in autumn foliage, Alaska
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Michio Hoshino / Dall's Sheep (Ovis dalli) group on snowy hillside, Alaska
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TOM MANGELSEN / Dall sheep / Thinhorn sheep (Ovis dalli) two rams resting, Denali National Park, Alaska, USA.
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Ashley Cooper / Dall's sheep (Ovis dalli) grazing on the tundra in autumn, Denali National Park, Alaska, USA, September.
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Ashley Cooper / Dall's sheep (Ovis dalli) grazing on the tundra in autumn, Denali National Park, Alaska, USA, September.
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Suzi Eszterhas / Dall sheep (Ovis dalli) group on cliffs, Seward Highway, Alaska, USA. July.
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Steven Kazlowski / Dall sheep (Ovis dalli) ram on Mount Margaret , Primrose Ridge, Denali National Park, Interior of Alaska, USA
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Gerrit Vyn / Dall sheep (Ovis dalli) mature ram, Denali National Park, Alaska, USA
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Gerrit Vyn / Dall sheep (Ovis dalli) rams sizing each other up. Establishing dominance is a constant activity for rams during the fall mating season. Denali National Park, Alaska, USA
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Gerrit Vyn / Dall sheep (Ovis dalli) ewe grazing, Denali National Park, Alaska USA September
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Gerrit Vyn / Dall Sheep (Ovis dalli) mature ram, Denali National Park, Alaska USA September
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Gerrit Vyn / Dall sheep (Ovis dalli) lamb tests a ram, Denali National Park, Alaska, USA
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Gerrit Vyn / Dall sheep (Ovis dalli) ewe and lambs, Denali National Park, Alaska, USA
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Konstantin Mikhailov / Dall sheep (Ovis dalli) male resting on the slope of the canyon, Denali NP, Alaska, USA, North America. September 2009.
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Konstantin Mikhailov / Dall sheep (Ovis dalli) male resting on the slope of the canyon, Denali NP, Alaska, USA, North America. September 2009.
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Patricio Robles Gil / Dall sheep (Ovis dalli) ram feeding, Denali National Park, Alaska, USA
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Patricio Robles Gil / Dall sheep (Ovis dalli) ram feeding, Denali National Park, Alaska, USA
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Patricio Robles Gil / Dall sheep (Ovis dalli) ram feeding, Denali National Park, Alaska, USA
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Patricio Robles Gil / Young Dall sheep (Ovis dalli) rams on ridge, Denali National Park, Alaska, USA
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Patricio Robles Gil / Stone sheep (Ovis dalli stonei) with lamb, Stone Mountain, British Columbia, Canada
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Patricio Robles Gil / Four Dall sheep (Ovis dalli) ram horns hung up, harvest from legal hunting, Mackenzie Mountains, Northwest Territories, Canada
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Patricio Robles Gil / Male Dall sheep (Ovis dalli) herd walking in line, South Nahanni Backbone Range, Mackenzie Mountains, North West Territories, Canada
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Patricio Robles Gil / Stone sheep (Ovis dalli stonei) lamb, portrait, Stone Mountain, British Columbia, Canada
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Patricio Robles Gil / Female Stone sheep (Ovis dalli stonei) portrait, Stone Mountain, British Columbia, Canada
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Patricio Robles Gil / Stone sheep (Ovis dalli stonei) female licking salt off road, with lamb nearby, Stone Mountain, British Columbia, Canada
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Patricio Robles Gil / Stone sheep (Ovis dalli stonei) on rocks, Stone Mountain, British Columbia, Canada
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Patricio Robles Gil / Stone sheep (Ovis dalli stonei) with lamb, Stone Mountain, British Columbia, Canada
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Patricio Robles Gil / Female Stone sheep (Ovis dalli stonei) Stone Mountain, British Columbia, Canada
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Patricio Robles Gil / Female Stone sheep (Ovis dalli stonei) walking, Stone Mountain, British Columbia, Canada
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Suzi Eszterhas / Dall sheep {Ovis dalli} resting on hill top with mountains behind, Denali NP, Alaska, USA
