Coyote in winter
A Coyote (Canis latrans) pauses while crossing snow covered Lamar Valley in Yellowstone NP, Wyoming
Badger
American Badger (Taxidea taxus) by its den in Lamar Valley, Yellowstone NP
Bison
Bison (Bison bison) unker down during a heavy snowstorm as winter approaches Yellowstone NP
Black Bear
Black Bear (Ursus americanus) in Yellowstone NP, in backcountry of Grand Canyon of the Yellowstone
A male Coyote (Canis latrans) stops in a field of snow in Yellowstone NP on a cold winter day
Rocky Mt Elk, bull
Bull Elk (Cervus elaphus) crossing river while approaching some cow elk during the fall rut
Rock Mt Elk, Bull
Rocky Mountain Elk (Cervus canadensis), bull crossing the Madison River in Yellowstone NP
Rocky Mountain Elk (Cervus canadensis), bull standing on the bank of the Madison River in Yellowstone NP
Bison (Bison bison) crossing the Nez Perce Creek in Yellowstone NP
Bull Elk in fog, Yellowstone NP
A Rocky Mountain Bull Elk (Cervus elaphus) advances into the fog shrouded Gibbon Meadows in his search for a rival bull bugling in the distance.
Dusky Grouse
Dusky Grouse (Dendragapus obscurus) on the forest floor of Yellowstone NP, Wyoming
Gray Wolf
A Gray Wolf (Canis lupus) walking along lake shore in Yellowstone NP, Wyoming
River Otter
River Otter (Lutra canadensis) playing and fishing in the Madison River of Yellowstone NP, Wyoming
Gray Wolf (Canis lupus) in a field of sage in Yellowstone NP
Grizzly Bear triplets
Grizzly Bear (Ursus arctos horribilis) 4 month old triplets on a spring day in Yellowstone NP, Wyoming
Grizzly Bear (Ursus arctos horribilis) sow with four month old cubs in Yellowstone NP, Wyoming
Grizzly Bear
Grizzly Bear (Ursus arctos horribilis) using a log to cross a stream bed in Yellowstone NP, Wyoming
Grizzly Bear cubs
Grizzly Bear (Ursus arctos horribilis) 4 month old cubs wrestling in Yellowstone NP, Wyoming
Grizzly Bear (Ursus arctos horribilis) four month old cubs exploring in Yellowstone NP, Wyoming
Gray Wolves at elk carcass
Gray Wolves (Canis lupus) feeding on an elk carcass in Hayden Valley, Yellowstone NP, Wyoming
Bison (Bison bison), bull in a defiant stance in sage brush in Yellowstone NP
Harlequin Ducks
Harlequin Duck (Histrionicus histrionicus), male and female, on a rock in Le Hardy Rapids of the Yellowstone River in Yellowstone national park
Grizzly Bear (Ursus arctos horribilis) foraging for food after a recent rainstorm in Yellowstone NP
