Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull in velvet with Canadian Rockies backdrop, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull bugling, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull with aspens, western Alberta, Canada
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George Sanker / Elk (Cervus canadensis), two cows and calf silhouetted on ridge at dusk. Yellowstone National Park, Wyoming, USA. June.
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Sebastian Kennerknecht / American Elk (Cervus elaphus nelsoni) bull grazing in winter, Gardiner, Yellowstone National Park, Montana
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George Sanker / Elk (Cervus canadensis) silhouetted against gloomy sky, Yellowstone National Park, Wyoming, USA, June.
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George Sanker / Elk (Cervus canadensis) silhouetted against grey sky, Yellowstone National Park, Wyoming, USA, June.
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Sylvain Cordier / Elk or Wapiti (Cervus canadensis), walking on a hill, Yellowstone National Park, USA
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Juan Carlos Munoz / Elk or wapiti (Cervus canadensis) calling in snow, Yellowstone National Park, Wyoming, USA, February.
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Juan Carlos Munoz / Elk or wapiti (Cervus canadensis) stags in snow, Yellowstone National Park, Wyoming, USA, February.
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Juan Carlos Munoz / Elk or wapiti (Cervus canadensis) in snow, Yellowstone National Park, Wyoming, USA, February.
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Juan Carlos Munoz / Elk / Wapiti (Cervus canadensis) stag in snow, Yellowstone National Park, Wyoming, USA.
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Juan Carlos Munoz / Elk / Wapiti (Cervus canadensis) herd, Yellowstone National Park, Wyoming, USA.
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Charlie Summers / Elk (Cervus canadensis) bull fighting a bush in a show of dominance during the rutting season. Rocky Mountain National Park, Colorado, USA. September.
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Jeff Vanuga / Elk (Cervus elaphus canadensis) herd in Grand Teton National Park, Wyoming, USA, June 2015.
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Jeff Vanuga / Elk (Cervus elaphus canadensis) group migrating from the Jackson Hole Refuge through the Gros Ventre, Bridger-Teton National Forest, Wyoming, USA, May 2015.
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Jeff Vanuga / Elk stag (Cervus elaphus canadensis) displaying during the rut. Yellowstone National Park, Wyoming, USA, Sepember.
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George Sanker / Elk (Cervus elaphus canadensis) bull in velvet. Yellowstone National Park, Wyoming, USA. June.
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George Sanker / Elk (Cervus elaphus canadensis) cow with group of young fawns. Yellowstone National Park, Wyoming, USA.
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Peter Cairns / Tourists watching Elk (Cervus canadensis) from horse and cart, National Elk Refuge, Wyoming, USA. February 2013.
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Peter Cairns / Larger herd of Elk (Cervus elaphus canadensis) migrating across National Elk Refuge, with Buffalo (Bison bison) herd behind, Wyoming, USA.
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Peter Cairns / Larger herd of Elk (Cervus elaphus canadensis) migrating across National Elk Refuge, with Buffalo (Bison bison) herd behind, Wyoming, USA.
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Peter Cairns / Larger herd of Elk (Cervus elaphus canadensis) migrating across National Elk Refuge, with Buffalo (Bison bison) herd behind, Wyoming, USA. February 2013.
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Staffan Widstrand / American elk (Cervus elaphus canadensis) stag calling during rut, Yellowstone National Park, Wyoming, USA. October.
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Staffan Widstrand / American elk (Cervus elaphus canadensis) stag sticking tongue out, Yellowstone National Park, Wyoming, USA
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Peter Cairns / Procession of migrating Elk (Cervus elaphus) and Bison (Bison bison) through the National Elk Refuge, Wyoming, USA, February.
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George Sanker / Elk (Cervus elaphus) mothers with their newborn gather in a high mountain meadow. Yellowstone National Park, Wyoming, USA, June
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) during the rutting season, Pennsylvania, USA.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) stag urinating on its underside, during the rutting season, Pennsylvania, USA.
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John Cancalosi / North American elk, (wapiti), Cervus elaphus, during rut, Pennsylvania, Elk were reintroduced to Pennsylvania in 1913
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) during the rut, Pennsylvania, USA, September.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) stag during rut, Pennsylvania, USA, September.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) during rut, Pennsylvania, USA, September.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) stag during rut, Pennsylvania, USA, September.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) female, Pennsylvania, USA.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) stag with harem during the rutting season, Pennsylvania, USA.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) stag with harem during the rutting season, Pennsylvania, USA.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) stag with harem during the rutting season, Pennsylvania, USA.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) stag with harem during the rutting season, Pennsylvania, USA.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) stag calling during the rutting season, Pennsylvania, USA.
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John Cancalosi / North American elk / Wapiti (Cervus elaphus) stag calling during the rutting season, Pennsylvania, USA.
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George Sanker / Elk (Cervus elaphus) herd with snow storm behind, Grand Teton National Park, Wyoming, USA, May. June.
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Charlie Summers / Male Elk (Cervus canadensis), with antlers covered in velvet, a vascular skin that supplies oxygen and nutrients to the growing bone, Colorado, USA, June.
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Kirkendall-Spring / Elk skull with antlers in snow, Lamar Valley, Yellowstone National Park, Wyoming, USA, February 2013.
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Kirkendall-Spring / Elk skull with antlers in snow, Lamar Valley, Yellowstone National Park, Wyoming, USA, February 2013.
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull in snow, Yellowstone National Park, Wyoming
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bulls sparring, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bulls sparring, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bulls sparring, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull bugling, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull scent marking sapling with antlers, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull bugling, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bulls sparring, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bulls sparring, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bulls, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull digging snow for forage, Yellowstone National Park, Wyoming
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull calling, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) herd crossing river, western Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull feeding on aquatic plants, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull in winter habitat, Jasper National Park, Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull bugling, North America
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull attempting to cross the Trans-Canadian Highway, Jasper National Park, Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bulls feeding in snow covered valley, Jasper National Park, Alberta, Canada
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Yva Momatiuk & John Eastcott / American Elk (Cervus elaphus nelsoni) females and calves resting near park headquarters with tourists, Yellowstone National Park, Wyoming
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Yva Momatiuk & John Eastcott / American Elk (Cervus elaphus nelsoni) females and calves resting near park headquarters with tourists, Yellowstone National Park, Wyoming
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Yva Momatiuk & John Eastcott / American Elk (Cervus elaphus nelsoni) females and calves resting near park headquarters, Yellowstone National Park, Wyoming
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Donald M. Jones / Timber Wolf (Canis lupus) group keeping American Elk (Cervus elaphus nelsoni) in river with charging elk, Yellowstone National Park, Wyoming
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Donald M. Jones / Timber Wolf (Canis lupus) group keeping American Elk (Cervus elaphus nelsoni) in river, Yellowstone National Park, Wyoming
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Donald M. Jones / Timber Wolf (Canis lupus) pair keeping American Elk (Cervus elaphus nelsoni) in river, Yellowstone National Park, Wyoming
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Donald M. Jones / Timber Wolf (Canis lupus) pair keeping American Elk (Cervus elaphus nelsoni) in river, Yellowstone National Park, Wyoming
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Donald M. Jones / Timber Wolf (Canis lupus) group running down American Elk (Cervus elaphus nelsoni) bull, Yellowstone National Park, Wyoming
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Donald M. Jones / Timber Wolf (Canis lupus) group running down American Elk (Cervus elaphus nelsoni) bull, Yellowstone National Park, Wyoming
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Donald M. Jones / Timber Wolf (Canis lupus) keeping American Elk (Cervus elaphus nelsoni) in river, Yellowstone National Park, Wyoming
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) male and cow interacting, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) calf feeding while standing in creek, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull eating Quaking Aspen (Populus tremuloides) bark in winter, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) chew marks on bark of Quaking Aspen (Populus tremuloides), western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull bedded in background and elk chews on Quaking Aspen (Populus tremuloides) bark in foreground, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull in snow, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bed in snow, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) chew marks on bark of Quaking Aspen (Populus tremuloides), western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) scat in snow, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull feeding on Douglas Fir (Pseudotsuga menziesii), western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bulls sparring in winter, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull amid bushes, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) calf feeding on berries, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull resting in snow, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) cow feeding on pond vegetation, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull crossing river, North America
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull and tourists along road, Jasper National Park, Alberta, Canada
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull in velvet grazing on grass, western Alberta, Canada