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: 19693
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.
Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming
Image ID: 13319
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.
Location: Midway Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13571
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.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 26939
2006 Mavericks surf contest champion Grant Twiggy Baker of South Africa. Final round, Mavericks surf contest, February 7, 2006.
Location: Mavericks, Half Moon Bay, California
Image ID: 15299
The Tree of Eons, a spectacular dendritic formation in the Bentonite Hills of Utah. Fantastic colorful sedimentary patterns, ancient Bentonite layers are exposed through erosion in the Utah Badlands. The Bentonite Hills are composed of the Brushy Basin shale member of the Morrison Formation. This layer was formed during Jurassic times when mud, silt, fine sand, and volcanic ash were deposited in swamps and lakes. Photographed just before sunrise with soft pre-dawn illumination. Aerial panoramic photograph.
Location: Utah
Image ID: 37951
Panorama dimensions: 11000 x 15000
Fin whale underwater. The fin whale is the second longest and sixth most massive animal ever, reaching lengths of 88 feet.
Species: Fin whale, Balaenoptera physalus
Image ID: 27594
Fin whale underwater. The fin whale is the second longest and sixth most massive animal ever, reaching lengths of 88 feet.
Species: Fin whale, Balaenoptera physalus
Image ID: 27597
California brown pelican in flight, spreading wings wide to slow in anticipation of landing on seacliffs. Note the classic winter breeding plumage, with bright red throat, yellow and white head and neck, and brown hind neck. Other pelicans and cormorants at the periphery of the image hint at how crowded the cliff is with other birds.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 36679
The Virgin River Narrows, where the Virgin River has carved deep, narrow canyons through the Zion National Park sandstone, creating one of the finest hikes in the world.
Location: Virgin River Narrows, Zion National Park, Utah
Image ID: 28575
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 the famous and popular Artist Point on the south side of the Grand Canyon of the Yellowstone.
Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming
Image ID: 07769
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 the famous and popular Artist Point on the south side of the Grand Canyon of the Yellowstone.
Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming
Image ID: 07770
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 the famous and popular Artist Point on the south side of the Grand Canyon of the Yellowstone.
Location: Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming
Image ID: 07771