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Yellowstone Falls from Uncle Tom's Trail.  Lower Yellowstone Falls shows a beautiful rainbow as it cascades 308' in a thundering plunge into the Grand Canyon of the Yellowstone River, Yellowstone National Park, Wyoming
Yellowstone Falls from Uncle Tom's Trail. Lower Yellowstone Falls shows a beautiful rainbow as it cascades 308' in a thundering plunge into the Grand Canyon of the Yellowstone River.
Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming
Image ID: 26942  
Grotto Geyser, Yellowstone National Park, Upper Geyser Basin
Grotto Geyser, Yellowstone National Park.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 07204  
Grotto Geyser, Yellowstone National Park, Upper Geyser Basin
Grotto Geyser, Yellowstone National Park.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 07206  
Grand Prismatic Spring displays brilliant colors along its edges, created by species of thermophilac (heat-loving) bacteria that thrive in narrow temperature ranges. The outer orange and red regions are the coolest water in the spring, where the overflow runs off, Midway Geyser Basin, Yellowstone National Park, Wyoming
Grand Prismatic Spring displays brilliant colors along its edges, created by species of thermophilac (heat-loving) bacteria that thrive in narrow temperature ranges. The outer orange and red regions are the coolest water in the spring, where the overflow runs off.
Location: Midway Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 07264  
A coyote hunts for voles in tall grass, autumn, Canis latrans, Yellowstone National Park, Wyoming
A coyote hunts for voles in tall grass, autumn.
Species: Coyote, Canis latrans
Location: Yellowstone National Park, Wyoming
Image ID: 19638  
Juvenile elk in golden, late afternoon light, in meadow along Madison River, autumn, Cervus canadensis, Yellowstone National Park, Wyoming
Juvenile elk in golden, late afternoon light, in meadow along Madison River, autumn.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 19709  
Female and young elk in early autumn snowfall, Cervus canadensis, Yellowstone National Park, Wyoming
Female and young elk in early autumn snowfall.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 19713  
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females, Cervus canadensis, Mammoth Hot Springs, Yellowstone National Park, Wyoming
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females.
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming
Image ID: 19715  
Juvenile elk in golden, late afternoon light, in meadow along Madison River, autumn, Cervus canadensis, Yellowstone National Park, Wyoming
Juvenile elk in golden, late afternoon light, in meadow along Madison River, autumn.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 19717  
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females, Cervus canadensis, Yellowstone National Park, Wyoming
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 19719  
Juvenile elk in golden, late afternoon light, in meadow along Madison River, autumn, Cervus canadensis, Yellowstone National Park, Wyoming
Juvenile elk in golden, late afternoon light, in meadow along Madison River, autumn.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 19720  
Elk, bull elk, adult male elk with large set of antlers.  By September, this bull elk's antlers have reached their full size and the velvet has fallen off. This bull elk has sparred with other bulls for access to herds of females in estrous and ready to mate, Cervus canadensis, Yellowstone National Park, Wyoming
Elk, bull elk, adult male elk with large set of antlers. By September, this bull elk's antlers have reached their full size and the velvet has fallen off. This bull elk has sparred with other bulls for access to herds of females in estrous and ready to mate.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 19722  
Male elk (bull) alongside female elk in grassy meadow, during rutting season.  A bull will defend his harem of 20 cows or more from competing bulls and predators. Only mature bulls have large harems and breeding success peaks at about eight years of age. Bulls between two to four years and over 11 years of age rarely have harems, and spend most of the rut on the periphery of larger harems. Young and old bulls that do acquire a harem hold it later in the breeding season than do bulls in their prime. A bull with a harem rarely feeds and he may lose up to 20 percent of his body weight while he is guarding the harem, Cervus canadensis, Yellowstone National Park, Wyoming
Male elk (bull) alongside female elk in grassy meadow, during rutting season. A bull will defend his harem of 20 cows or more from competing bulls and predators. Only mature bulls have large harems and breeding success peaks at about eight years of age. Bulls between two to four years and over 11 years of age rarely have harems, and spend most of the rut on the periphery of larger harems. Young and old bulls that do acquire a harem hold it later in the breeding season than do bulls in their prime. A bull with a harem rarely feeds and he may lose up to 20 percent of his body weight while he is guarding the harem.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 19723  
Bull elk, with large antlers, alongside female elk during rutting season, autumn.  A bull will defend his harem of 20 cows or more from competing bulls and predators. Only mature bulls have large harems and breeding success peaks at about eight years of age. Bulls between two to four years and over 11 years of age rarely have harems, and spend most of the rut on the periphery of larger harems. Young and old bulls that do acquire a harem hold it later in the breeding season than do bulls in their prime. A bull with a harem rarely feeds and he may lose up to 20 percent of his body weight while he is guarding the harem, Cervus canadensis, Yellowstone National Park, Wyoming
Bull elk, with large antlers, alongside female elk during rutting season, autumn. A bull will defend his harem of 20 cows or more from competing bulls and predators. Only mature bulls have large harems and breeding success peaks at about eight years of age. Bulls between two to four years and over 11 years of age rarely have harems, and spend most of the rut on the periphery of larger harems. Young and old bulls that do acquire a harem hold it later in the breeding season than do bulls in their prime. A bull with a harem rarely feeds and he may lose up to 20 percent of his body weight while he is guarding the harem.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 19724  
Bull elk in sage brush with large rack of antlers during the fall rut (mating season).  This bull elk has sparred with other bulls to establish his harem of females with which he hopes to mate, Cervus canadensis, Mammoth Hot Springs, Yellowstone National Park, Wyoming
Bull elk in sage brush with large rack of antlers during the fall rut (mating season). This bull elk has sparred with other bulls to establish his harem of females with which he hopes to mate.
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming
Image ID: 19746  
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females, Cervus canadensis, Madison River, Yellowstone National Park, Wyoming
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females.
Species: Elk, Cervus canadensis
Location: Madison River, Yellowstone National Park, Wyoming
Image ID: 19781  
Bull elk, with large antlers, alongside female elk during rutting season, autumn.  A bull will defend his harem of 20 cows or more from competing bulls and predators. Only mature bulls have large harems and breeding success peaks at about eight years of age. Bulls between two to four years and over 11 years of age rarely have harems, and spend most of the rut on the periphery of larger harems. Young and old bulls that do acquire a harem hold it later in the breeding season than do bulls in their prime. A bull with a harem rarely feeds and he may lose up to 20 percent of his body weight while he is guarding the harem, Cervus canadensis, Yellowstone National Park, Wyoming
Bull elk, with large antlers, alongside female elk during rutting season, autumn. A bull will defend his harem of 20 cows or more from competing bulls and predators. Only mature bulls have large harems and breeding success peaks at about eight years of age. Bulls between two to four years and over 11 years of age rarely have harems, and spend most of the rut on the periphery of larger harems. Young and old bulls that do acquire a harem hold it later in the breeding season than do bulls in their prime. A bull with a harem rarely feeds and he may lose up to 20 percent of his body weight while he is guarding the harem.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 19782  
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females, Cervus canadensis, Mammoth Hot Springs, Yellowstone National Park, Wyoming
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females.
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming
Image ID: 19788  
Excelsior Geyser, now dormant, was formerly the worlds largest geyser. It still produces immense runoff into the Firehole River: 4,500 gallons per minute, or 6 million gallons per day. It is located in Midway Geyser Basin, Yellowstone National Park, Wyoming
Excelsior Geyser, now dormant, was formerly the worlds largest geyser. It still produces immense runoff into the Firehole River: 4,500 gallons per minute, or 6 million gallons per day. It is located in Midway Geyser Basin.
Location: Midway Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 26953  
Wildflowers on Mount Washburn, on the north side of Dunraven Pass near Tower Junction, Helianthella uniflora, Yellowstone National Park, Wyoming
Wildflowers on Mount Washburn, on the north side of Dunraven Pass near Tower Junction.
Species: Little sunflower, One-eyed sunflower, Helianthella uniflora
Location: Yellowstone National Park, Wyoming
Image ID: 26960  
Panorama dimensions: 5154 x 8796
Madison River steaming in the cold air, sunrise, autumn, tall grasses and golden light, Yellowstone National Park, Wyoming
Madison River steaming in the cold air, sunrise, autumn, tall grasses and golden light.
Location: Madison River, Yellowstone National Park, Wyoming
Image ID: 19592  
Bacteria mats and Grand Prismatic Spring.  The orange color is due to bacteria which thrive only on the cooler fringes of the hot spring, while the hotter center of the spring hosts blue-colored bacteria, Midway Geyser Basin, Yellowstone National Park, Wyoming
Bacteria mats and Grand Prismatic Spring. The orange color is due to bacteria which thrive only on the cooler fringes of the hot spring, while the hotter center of the spring hosts blue-colored bacteria.
Location: Midway Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 26954  
Morning Glory Pool, has long been considered a must-see site in Yellowstone. At one time a road brought visitors to its brink. Over the years they threw coins, bottles and trash in the pool, reducing its flow and causing the red and orange bacteria to creep in from its edge, replacing the blue bacteria that thrive in the hotter water at the center of the pool. The pool is now accessed only by a foot path, Upper Geyser Basin, Yellowstone National Park, Wyoming
Morning Glory Pool, has long been considered a must-see site in Yellowstone. At one time a road brought visitors to its brink. Over the years they threw coins, bottles and trash in the pool, reducing its flow and causing the red and orange bacteria to creep in from its edge, replacing the blue bacteria that thrive in the hotter water at the center of the pool. The pool is now accessed only by a foot path.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 26955  
Bacteria mats and Grand Prismatic Spring.  The orange color is due to bacteria which thrive only on the cooler fringes of the hot spring, while the hotter center of the spring hosts blue-colored bacteria, Midway Geyser Basin, Yellowstone National Park, Wyoming
Bacteria mats and Grand Prismatic Spring. The orange color is due to bacteria which thrive only on the cooler fringes of the hot spring, while the hotter center of the spring hosts blue-colored bacteria.
Location: Midway Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 26958  
Panorama dimensions: 4624 x 8376
Panorama of Excelsior Geyser, now dormant, was formerly the worlds largest geyser. It still produces immense runoff into the Firehole River: 4,500 gallons per minute, or 6 million gallons per day. It is located in Midway Geyser Basin, Yellowstone National Park, Wyoming
Panorama of Excelsior Geyser, now dormant, was formerly the worlds largest geyser. It still produces immense runoff into the Firehole River: 4,500 gallons per minute, or 6 million gallons per day. It is located in Midway Geyser Basin.
Location: Midway Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 26959  
Panorama dimensions: 5188 x 10216
Bacteria mats and Grand Prismatic Spring.  The orange color is due to bacteria which thrive only on the cooler fringes of the hot spring, while the hotter center of the spring hosts blue-colored bacteria, Midway Geyser Basin, Yellowstone National Park, Wyoming
Bacteria mats and Grand Prismatic Spring. The orange color is due to bacteria which thrive only on the cooler fringes of the hot spring, while the hotter center of the spring hosts blue-colored bacteria.
Location: Midway Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 26964  
Tourists get a good look at wild elk who have become habituated to human presence in Yellowstone National Park, Cervus canadensis
Tourists get a good look at wild elk who have become habituated to human presence in Yellowstone National Park.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 13161  
Tourists get a good look at wild elk who have become habituated to human presence in Yellowstone National Park, Cervus canadensis
Tourists get a good look at wild elk who have become habituated to human presence in Yellowstone National Park.
Species: Elk, Cervus canadensis
Location: Yellowstone National Park, Wyoming
Image ID: 13192  
Coyote crosses a road in front of a car.  Dozens of coyotes, wolves, bears, elk and bison are killed each year in Yellowstone as they attempt to cross the roads in front of drivers who are not paying attention or speeding, Canis latrans, Yellowstone National Park, Wyoming
Coyote crosses a road in front of a car. Dozens of coyotes, wolves, bears, elk and bison are killed each year in Yellowstone as they attempt to cross the roads in front of drivers who are not paying attention or speeding.
Species: Coyote, Canis latrans
Location: Yellowstone National Park, Wyoming
Image ID: 19649  
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females, Cervus canadensis, Mammoth Hot Springs, Yellowstone National Park, Wyoming
Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females.
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming
Image ID: 19694