Daniel J. Cox / Gray Wolf (Canis lupus) pack on ridge in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Kirkendall-Spring / Hills in the Lamar Valley, in snow, Yellowstone National Park, Wyoming, USA, February 2013.
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Kirkendall-Spring / American buffalo / Bison (Bison bison) in deep snow, Lamar Valley, Yellowstone National Park, Wyoming, USA, January
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Nick Garbutt / Rocky mountain bighorn sheep (Ovis canadensis canadensis) grazing. Lamar Valley, Yellowstone National Park, Wyoming, USA. January
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Nick Garbutt / Rocky Mountain bighorn sheep (Ovis canadensis canadensis) male grazing. Lamar Valley, Yellowstone National Park, Wyoming, USA. January
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Nick Garbutt / Coyotes (Canis latrans) walking in snow. Lamar River Valley, Yellowstone National Park, Wyoming, USA.
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram digging up shrub in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram browsing in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Coyote (Canis latrans) pack in territorial howl in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Coyote (Canis latrans) pack in territorial howl in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Kirkendall-Spring / The Lamar River mostly frozen by winters cold in the Lamar Valley of Yellowstone National Park, Wyoming, USA. January 2018.
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Phil Savoie / American bison (Bison bison) Lamar Valley, Yellowstone National Park, Montana, USA, July.
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Mike Read / Clark's nutcracker (Nucifraga columbiana) juvenile searching for food in pine tree, Lamar Valley, Yellowstone National Park, Wyoming, USA, June.
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Mike Read / Clark's nutcracker (Nucifraga columbiana) two juveniles searching for food in pine tree, Lamar Valley, Yellowstone National Park, Wyoming, USA, June.
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Benjamin Olson / American Bison (Bison bison) running in snow, Lamar Valley, Yellowstone National Park, Wyoming
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Nick Garbutt / American bison (Bison bison) male Lamar Valley. Yellowstone National Park, Wyoming, USA. June
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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 / Coyote (Canis latrans) pouncing, hunting for rodents in snow. Lamar River Valley, Yellowstone National Park, Wyoming, USA.
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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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Nick Garbutt / American bison (Bison bison) running in front of a tourist vehicle on the road through the Lamar Valley. Yellowstone National Park, Wyoming, USA. June
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Kirkendall-Spring / Cottonwood trees (Populus deltoides), Lamar Valley, Yellowstone National Park, Wyoming, USA. February 2016.
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Kirkendall-Spring / Cottonwood trees (Populus deltoides) Lamar Valley, Yellowstone National Park, Wyoming, USA. February 2016.
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Kirkendall-Spring / Frosted Cottonwood trees (Populus deltoides) at Buffalo Ranch, Lamar Valley, Yellowstone National Park, Wyoming, USA. February 2016.
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Kirkendall-Spring / Frosted Cottonwood trees (Populus deltoides) at Buffalo Ranch, Lamar Valley, Yellowstone National Park, Wyoming, USA. February 2016.
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Kirkendall-Spring / Winter with Cottonwood trees (Populus deltoides) Lamar Valley, Yellowstone National Park, Wyoming, USA. Januray 2016.
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Kirkendall-Spring / Winter sunrise with reflection on Lamar River, Lamar Valley, Yellowstone National Park, Wyoming, USA. February 2016.
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Mike Read / Monument plant (Frasera speciosa) Lamar Valley, Yellowstone National Park, Wyoming USA June
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Mike Read / Monument plant (Frasera speciosa) Lamar Valley, Yellowstone National Park, Wyoming USA June
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Mike Read / Rocky mountain iris (Iris missouriensis) Lamar Valley, Yellowstone National Park, Wyoming June
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Mike Read / Long-plumed purple avens (Geum trifolium) Lamar Valley, Yellowstone National Park, Wyoming USA June
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Mike Read / Long-plumed purple avens (Geum trifolium) Lamar Valley, Yellowstone National Park, Wyoming USA June
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Mike Read / Clark's nutcracker (Nucifraga columbiana) juvenile in pine tree, Lamar Valley, Yellowstone National Park, Wyoming, USA, June
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Mike Read / Clark's nutcracker (Nucifraga columbiana) juvenile in pine tree, Lamar Valley, Yellowstone National Park, Wyoming, USA, June
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Kirkendall-Spring / Cabin in snow on starry night, Buffalo Ranch, Lamar Valley, Yellowstone National Park, Wyoming, USA. February 2015.
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Kirkendall-Spring / Lamar River in snow, Lamar Valley of Yellowstone National Park, Wyoming, USA. February 2015.
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Kirkendall-Spring / Elk skull and antlers (Cervus elaphus) in snow, Lamar Valley, Yellowstone National Park, Wyoming , USA. February 2015.
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Floris van Breugel / American Bison (Bison bison) herd resting in the snow at sunrise, Lamar Valley, Yellowstone National Park, Wyoming, USA. December.
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Floris van Breugel / A coyote (Canis latrans) hunting in the snow, Lamar Valley, Yellowstone National Park, Wyoming, USA. December.
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Floris van Breugel / American Bison (Bison bison) herd march through the Lamar Valley, Yellowstone National Park, Wyoming, USA. December.
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Floris van Breugel / American Bison (Bison bison) covered in snow, Lamar Valley, Yellowstone National Park, Wyoming, USA. December.
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Floris van Breugel / Sunrise over the Lamar Valley in winter, Yellowstone National Park, Wyoming, USA. December 2013.
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Floris van Breugel / A wild Grey Wolf (Canis lupus), dark form, standing in the snow, Lamar Valley, Yellowstone National Park, Wyoming, USA. January.
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Floris van Breugel / A Red Fox (Vulpes vulpes) waking up from a nap, Lamar Valley, Yellowstone National Park, Wyoming, USA. December.
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Floris van Breugel / A large bull Elk (Cervus canadensis) resting under frosty Cottonwood trees in the Lamar Valley, Yellowstone National Park, Wyoming, USA. Panoramic stitch of 2 images.
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Kirkendall-Spring / Rose Creek and trees in snow,Lamar Valley, Yellowstone National Park, Wyoming, USA, January 2014.
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Kirkendall-Spring / Fence line at the Buffalo Ranch, Lamar Valley, Yellowstone National Park, Wyoming, USA, January 2014.
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Kirkendall-Spring / Fence with shadows on snow, Buffalo Ranch, Lamar Valley, Yellowstone National Park, Wyoming, USA, January 2014.
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Kirkendall-Spring / Sunset in the Lamar Valley of 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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Kirkendall-Spring / Elk skull with antlers in snow, Lamar Valley, Yellowstone National Park, Wyoming, USA, February 2013.
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Kirkendall-Spring / Sunset in the Lamar Valley of Yellowstone National Park, Wyoming, USA, June 2013.
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Kirkendall-Spring / Remains of an elk in the Lamar Valley of Yellowstone National Park, Wyoming, USA, June 2013.
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Kirkendall-Spring / Fence line, Buffalo Ranch, Lamar Valley of Yellowstone National Park. Wyoming, USA, January 2012
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Kirkendall-Spring / Frost covered grass and Ranger Peak, Lamar Valley, Yellowstone National Park. Wyoming, USA January
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Kirkendall-Spring / Frost on grass along the Lamar River, Lamar Valley of Yellowstone National Park. Wyoming, USA, January 2012
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Kirkendall-Spring / Frosted grass along the Lamar River in the Lamar Valley of Yellowstone National Park. Wyoming, USA, January 2012
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Kirkendall-Spring / Detail of frosted grass in the Lamar Valley, Yellowstone National Park. Wyoming, USA, January
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Nick Garbutt / Herd of American Bison (Bison bison) in snow along the Lamar River Valley. Yellowstone National Park, Wyoming, USA, February. Digital composite.
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Floris van Breugel / Red Fox (Vulpes vulpes) follows its winter hunting trail through the Lamar Valley in Yellowstone National Park, Wyoming, USA. December.
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Kirkendall-Spring / American buffalo / Bison (Bison bison) walking along road to avoid deep snow, Lamar Valley, Yellowstone National Park, Washington, USA, January 2011
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George Sanker / Rocky Mountain Douglas-fir (Pseudotsuga menziesii). Lamar Valley, Yellowstone National Park, Wyoming, USA, May.
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Diane McAllister / Two Pronghorn antelope (Antilocapra americana) sparring in a open grass and sagebrush area of Lamar Valley. Yellowstone National Park, Wyoming, USA, May
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Peter Cairns / Wolf watchers looking out over Lamar Valley. Yellowstone National Park, Wyoming, USA, September.
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Rob Tilley / Hoarfrost on Cottonwood Trees (Populus deltoides), Lamar Valley, Yellowstone NP, Wyoming, USA
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Jeff Vanuga / Buffalo / Bison {Bison bison} grazing in Lamar Valley, Yellowstone National Park, Wyoming, USA
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David Welling / Mini waterfall in Lamar Valley, Yellowstone NP, Wyoming, USA
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Philippe Clement / Monument plant {Frasera speciosum} Lamar Valley, Yellowstone NP, Wyoming, USA.
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Philippe Clement / American bison, bull + herd {Bison bison} Lamar valley, Yellowstone NP, Wyoming, USA.
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Philippe Clement / Kettle ponds in the Lamar Valley, Yellowstone NP, Wyoming, USA.
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Niall Benvie / Cottonwood trees (Populus deldoides) with early snow Lamar Valley, Pennsylvannia, USA
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Niall Benvie / Cottonwood trees with early snow (Populus deldoides) Pennsylvania, USA.
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David Kjaer / View north from Mount Washburn, Lamar valley, Yellowstone, Wyoming, USA
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Philippe Clement / Shed antlers of Elk {Cervus elaphus} in Lamar valley, Yellowstone, USA
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Sumio Harada / Gray Wolf (Canis lupus) member of the Druid Pack, feeding on elk carcass in Lamar Canyon, Yellowstone National Park, Wyoming
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Sumio Harada / Gray Wolf (Canis lupus) member of the Druid Pack and Coyote (Canis latrans) pause while feeding on elk carcass, Lamar Valley, Yellowstone National Park, Wyoming
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Chase Dekker / American Bison (Bison bison) trio in valley, Lamar River, Lamar Valley, Yellowstone National Park, Wyoming
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Chase Dekker / American Bison (Bison bison) herd crossing river, Lamar River, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) rams fighting in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) rams fighting in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) rams fighting in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) rams in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) rams browsing in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram browsing in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Bighorn Sheep (Ovis canadensis) ram browsing in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Coyote (Canis latrans) pack in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Coyote (Canis latrans) pair in dominance display in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Sebastian Kennerknecht / Moose (Alces alces shirasi) bull browsing in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Daniel J. Cox / River in grassland, Lamar Valley, Yellowstone National Park, Wyoming
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Benjamin Olson / American Bison (Bison bison) pair in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Benjamin Olson / American Bison (Bison bison) in winter, Lamar Valley, Yellowstone National Park, Wyoming
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Duncan Usher / American Bison (Bison bison) cow with two calves running, Lamar Valley, Yellowstone National Park, Wyoming