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| 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. Image ID: 19693 Species: Elk, Cervus canadensis Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA | Bull elk spar to establish harems of females, Gibbon Meadow. Image ID: 13151 Species: Elk, Cervus canadensis Location: Gibbon Meadows, Yellowstone National Park, Wyoming, USA | A rainbow appears in the mist of the Lower Falls of the Yellowstone River. At 308 feet, the Lower Falls of the Yellowstone River is the tallest fall in the park. This view is from Lookout Point on the North side of the Grand Canyon of the Yellowstone. When conditions are perfect in midsummer, a midmorning rainbow briefly appears in the falls. Image ID: 13319 Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming, USA |
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| Grand Prismatic Spring (left) and Excelsior Geyser (right). Grand Prismatic Spring displays a stunning rainbow of colors created by species of thermophilac (heat-loving) bacteria that thrive in narrow temperature ranges. The blue water in the center is too hot to support any bacterial life, while the outer orange rings are the coolest water. Grand Prismatic Spring is the largest spring in the United States and the third-largest in the world. Midway Geyser Basin. Image ID: 13571 Location: Midway Geyser Basin, Yellowstone National Park, Wyoming, USA | Old Faithful geyser, sunrise. Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named. Image ID: 26939 Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Mule deer in tall grass, fall, autumn. Image ID: 19577 Species: Mule deer, Odocoileus hemionus Location: Yellowstone National Park, Wyoming, USA |
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| The bisons massive head is its most characteristic feature. Its forehead bulges because of its convex-shaped frontal bone. Its shoulder hump, dwindling bowlike to the haunches, is supported by unusually long spinal vertebrae. Over powerful neck and shoulder muscles grows a great shaggy coat of curly brown fur, and over the head, like an immense hood, grows a shock of black hair. Its forequarters are higher and much heavier than its haunches. A mature bull stands about 6 1/2 feet (2 meters) at the shoulder and weighs more than 2,000 pounds (900 kilograms). The bisons horns are short and black. In the male they are thick at the base and taper abruptly to sharp points as they curve outward and upward; the females horns are more slender. Image ID: 13120 Species: American bison, Bison bison Location: Yellowstone National Park, Wyoming, USA | Fly fishing below Gibbon Falls. This flyfisherman hiked up the Gibbon River to reach the foot of Gibbon Falls. Image ID: 13269 Location: Gibbon River, Yellowstone National Park, Wyoming, USA | A rainbow appears in the spray of Riverside Geyser as it erupts over the Firehole River. Riverside is a very predictable geyser. Its eruptions last 30 minutes, reach heights of 75 feet and are usually spaced about 6 hours apart. Upper Geyser Basin. Image ID: 13367 Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA |
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| 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. Image ID: 19697 Species: Elk, Cervus canadensis Location: Madison River, Yellowstone National Park, Wyoming, USA | Grizzly bear, autumn, fall, brown grasses. Image ID: 19614 Species: Grizzly bear, Ursus arctos horribilis Location: Lamar Valley, Yellowstone National Park, Wyoming, USA | 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. Image ID: 19700 Species: Elk, Cervus canadensis Location: Madison River, Yellowstone National Park, Wyoming, USA |
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| Old Faithful geyser. Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named. Image ID: 26945 Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Coyote in snow covered field along the Madison River. Image ID: 19635 Species: Coyote, Canis latrans Location: Yellowstone National Park, Wyoming, USA | Yellow-bellied marmots can often be found on rocky slopes, perched atop boulders. Image ID: 13055 Species: Yellow-bellied marmot, Marmota flaviventris Location: Yellowstone National Park, Wyoming, USA |
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| 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. Image ID: 13352 Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | A crowd enjoys watching Old Faithful geyser at peak eruption. Image ID: 13363 Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | A visitor videotapes the eruption of Lion Geyser, with Old Faithful Inn visible in the distance. Lion Geyser, whose eruption is preceded by a release of steam that sounds like a lion roaring, erupts just once or a few times each day, reaching heights of up to 90 feet. Upper Geyser Basin. Image ID: 13371 Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA |
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| Castle Geyser erupts, reaching 60 to 90 feet in height and lasting 20 minutes. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin. Image ID: 13417 Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Grand Geyser erupts (right) with a simultaneous eruption from Vent Geyser (left). Grand Geyser is a fountain-type geyser reaching 200 feet in height and lasting up to 12 minutes. Grand Geyser is considered the tallest predictable geyser in the world, erupting about every 12 hours. It is often accompanied by burst or eruptions from Vent Geyser and Turban Geyser just to its left. Upper Geyser Basin. Image ID: 13457 Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Grand Prismatic Spring displays a stunning rainbow of colors created by species of thermophilac (heat-loving) bacteria that thrive in narrow temperature ranges. The blue water in the center is too hot to support any bacterial life, while the outer orange rings are the coolest water. Grand Prismatic Spring is the largest spring in the United States and the third-largest in the world. Midway Geyser Basin. Image ID: 13573 Location: Midway Geyser Basin, Yellowstone National Park, Wyoming, USA |
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| 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. Image ID: 13587 Location: Midway Geyser Basin, Yellowstone National Park, Wyoming, USA | Steam rises above the Midway Geyser Basin, largely from Grand Prismatic Spring and Excelsior Geyser. The Firehole River flows by. Image ID: 13605 Location: Midway Geyser Basin, Yellowstone National Park, Wyoming, USA | New Blue Spring and its travertine terraces, part of the Mammoth Hot Springs complex. Image ID: 13623 Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA |
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| Bison. Image ID: 19598 Species: American bison, Bison bison Location: Yellowstone National Park, Wyoming, USA | 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. Image ID: 26942 Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming, USA | 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. Image ID: 26953 Location: Midway Geyser Basin, Yellowstone National Park, Wyoming, USA |
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| Madison River steaming in the cold air, sunrise, autumn, tall grasses and golden light. Image ID: 19592 Location: Madison River, Yellowstone National Park, Wyoming, USA | 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. Image ID: 26954 Location: Midway Geyser Basin, Yellowstone National Park, Wyoming, USA | Wildflowers on Mount Washburn, on the north side of Dunraven Pass near Tower Junction. Image ID: 26941 Species: One-eyed sunflower, Little sunflower, Helianthella uniflora Location: Yellowstone National Park, Wyoming, USA |
Natural History Photography Blog posts (20) related to Yellowstone National Park
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