Alex Hyde / Commuity of mosses predominately red Sphagnum Moss (Sphagnum sp.), with Reindeer Lichen (Cladonia sp.) growing alongside, in blanket bog. Glen Affric, Scotland, UK. October. Focus stacked image.

Charlie Summers / Black-footed ferret (Mustela nigripes) on Black-tailed prairie dog (Cynomys ludovicianus) mound, in snow. A reintroduction programme is underway with approximately 300 individuals of this critically e...

Charlie Summers / Black-footed ferret (Mustela nigripes) leaving a Black-tailed prairie dog (Cynomys ludovicianus) burrow whilst hunting for prey on snow covered prairie. Colorado, USA. January.

Charlie Summers / Black-footed ferret (Mustela nigripes) at edge of Prairie dog (Cynomys sp) burrow, hunting for prey. A reintroduction programme is underway with approximately 300 individuals of this critically endang...

Danny Green / Coyote (Canis latrans) standing in snow, dwarfed by frosty trees. Yellowstone National Park, USA, January.

Jack Dykinga / Foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Purple Owl's Clover (Castilleja exserta) flowers. Carrizo Plain, California, USA. 30th March 2019.

Ingo Arndt / Prairie rattlesnake (Crotalus viridis viridis), threat display, South Dakota, USA September. Sequence 1 of 3

Floris van Breugel / Paintbrush (Castilleja parviflora) flowering in withered sage bush, White Mountains, California, USA, July

Cheryl-Samantha Owen / Aaron Price riding his horse 'Beau' over his Ranch, Gracie Creek, Sandhills, Nebraska. Garfield County, Nebraska, USA. October 2014.

Cheryl-Samantha Owen / Lynn Ballagh closing gate on his cattle ranch, Sandhills of Nebraska, Garfield County, Nebraska, USA.

Ben Cranke / Coyote (Canis latrans) in the snow, Yellowstone National Park, Wyoming, USA. January.

Shattil & Rozinski,Shattil & Rozinski / Mule deer (Odocoileus hemionus), with the Denver skyline and Rocky Mountains in the background, Denver, Colorado, USA, November.

Jack Dykinga / Sunset Crater National Monument with dawn light on the San Francisco Peaks over fields of flowering Prairie sunflowers (Helianthus petiolaris) Arizona

Jack Dykinga / Sunflower flower (Helianthus petiolaris) at Sunset Crater National Monument, Arizona

Rolf Nussbaumer / Solitary bee, adult perched on Mexican hat (Ratibida columnifera) Dinero, Lake Corpus Christi, South Texas, USA.

David Welling / Utah Prairie Dog (Cynomys parvidens) standing on watch outside their burrow. Bryce Canyon National Park, Utah, USA, August.

John Cancalosi / Blacktail Prairie Dog (Cynomys ludovicianus) engaging in Jump-yip behavior - A strong arch of the back or "jump" followed by a shrill "yip" - Thought to occur when a predator has left the area and in...

Charlie Summers / Three Western Black-tailed Prairie Dogs (Cynomys ludovicianus) at entrance to burrow. Cheyenne River drainage south of Hot Springs, South Dakota, USA

Charlie Summers / Mustang (Equus caballus) herd trotting in light snow covered prairie, IRAM Wild Horse Sanctuary south of Hot Springs, South Dakota, USA, May

Charlie Summers / American bison (Bison bison) herd roaming the plains, Custer State Park, South Dakota, USA, September

David Tipling / Two male Greater prairie chickens (Tympanuchus cupido) fighting on lekking ground in the Sandhills, Nebraska. USA, April

Charlie Summers / Black-tailed Prairie dog (Cynomys ludovicianus) on hind legs, emitting territorial call, Downtown Parker, Colorado, USA, North America

Gerrit Vyn / Aggressive encounter between two male Greater Prairie-Chickens (Tympanachus cupido) on a lek. During these aggressive encounters, males lower their pinnae feathers, deflate their air sacs, leap into t...

Gerrit Vyn / Aggressive encounter between two male Greater Prairie-Chickens (Tympanachus cupido) on a lek. During these aggressive encounters, males lower their pinnae feathers, deflate their air sacs, leap into t...

Jack Dykinga / Prairie sunflowers (Helianthus petiolaris) catching the sunlight on a sand dune in deep morning shadow. Great Sand Dunes National Monument, Colorado, USA

Shattil & Rozinski / Juvenile Swift fox (Vulpes velox) stalking prey on the shortgrass prairie of Southern Wyoming, Wyoming, USA

Shattil & Rozinski / Swift fox (Vulpes velox) running, backlit, Wyoming, USA

Rolf Nussbaumer / Lesser Prairie-Chicken {Tympanuchus pallidicinctus} males fighting, Panhandle, Texas, USA, February

Carol Walker / Bay Warmblood mare running in Longmont, Colorado.

Carol Walker / Cowboys driving horses (Equus caballus) across the water at Sombrero Ranch, Craig, Colorado. Model released.

Shattil & Rozinski / Wild horse / Mustang {Equus caballus} in snow, Colorado, USA

Shattil & Rozinski / Lesser prairie chicken {Tympanuchus pallidicintus} males fighting at lek, Colorado, USA

Nigel Bean / Black tailed prairie dogs at burrow entrance{Cynomys ludovicianus} Colorado, USA

David Kjaer / Black tailed prairie dogs, Arizona, USA

Thomas Lazar / Black tailed prairie dog (Cynomys ludovicianus) alert female, Custer State Park, South Dakota, USA

Lynn M Stone / Striped skunk (Mephitis mephitis) USA captive

Jim Brandenburg / Monarch (Danaus plexippus) butterfly group resting on Giant Sunflower (Helianthus giganteus) during migration, Iowa

Jim Brandenburg / Giant Walking Stick (Megaphasma dentricus) camouflaged among prairie grasses, North Dakota

Jim Brandenburg / Ponderosa Pine (Pinus ponderosa) tree on prairie, Wind Cave National Park, South Dakota

Donald M. Jones / American Bison (Bison bison) herd in grassland, National Bison Range, Moise, Montana

Donald M. Jones / Black-tailed Prairie Dog (Cynomys ludovicianus) group, South Dakota

Donald M. Jones / Black-tailed Prairie Dog (Cynomys ludovicianus) pair greeting, South Dakota

Donald M. Jones / Black-tailed Prairie Dog (Cynomys ludovicianus) pair greeting, South Dakota

Yva Momatiuk & John Eastcott / Black-tailed Prairie Dog (Cynomys ludovicianus) on alert, Theodore Roosevelt National Park, North Dakota

Jim Brandenburg / American Bison (Bison bison) herd on prairie with quartz, Blue Mounds State Park, Minnesota

Jim Brandenburg / Fire in prairie, Minnesota

Ingo Arndt / Prairie Rattlesnake (Crotalus viridis viridis) in defensive posture, South Dakota