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: 19698
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: Mammoth Hot Springs, Yellowstone National Park, Wyoming
Image ID: 19721
California sea lion, underwater at Santa Barbara Island. Santa Barbara Island, 38 miles off the coast of southern California, is part of the Channel Islands National Marine Sanctuary and Channel Islands National Park. It is home to a large population of sea lions.
Species: California sea lion, Zalophus californianus
Location: Santa Barbara Island, California
Image ID: 23418
The Virgin River flows by autumn cottonwood trees, part of the Virgin River Narrows. This is a fantastic hike in fall with the comfortable temperatures, beautiful fall colors and light crowds.
Location: Virgin River Narrows, Zion National Park, Utah
Image ID: 26098
A blue whale spouts at sunset. The blow, or spout, of a blue whale can reach 30 feet into the air. The blue whale is the largest animal ever to live on earth.
Species: Blue whale, Balaenoptera musculus
Image ID: 02217
Milky Way during Full Lunar Eclipse over Arch Rock, Joshua Tree National Park, April 4 2015. The arch and surrounding landscape are illuminated by the faint light of the fully-eclipsed blood red moon. Light from the sun has passed obliquely through the Earth's thin atmosphere, taking on a red color, and is then reflected off the moon and reaches the Earth again to light the arch. The intensity of this light is so faint that the Milky Way can be seen clearly at the same time.
Location: Joshua Tree National Park, California
Image ID: 30717
Panorama dimensions: 8903 x 14184
Los Islotes, famous for its friendly colony of California sea lions, part of Archipelago Espiritu Santo, Sea of Cortez, Aerial Photo.
Location: Los Islotes, Baja California, Mexico
Image ID: 32409
Roosevelt elk, adult bull male with large antlers. This bull elk has recently shed the velvet that covers its antlers. While an antler is growing, it is covered with highly vascular skin called velvet, which supplies oxygen and nutrients to the growing bone; once the antler has achieved its full size, the velvet is lost and the antler's bone dies. This dead bone structure is the mature antler, which is itself shed after each mating season. Roosevelt elk grow to 10' and 1300 lb, eating grasses, sedges and various berries, inhabiting the coastal rainforests of the Pacific Northwest.
Species: Roosevelt elk, Cervus canadensis roosevelti
Location: Redwood National Park, California
Image ID: 25890
California sea lions, underwater at Santa Barbara Island. Santa Barbara Island, 38 miles off the coast of southern California, is part of the Channel Islands National Marine Sanctuary and Channel Islands National Park. It is home to a large population of sea lions.
Species: California sea lion, Zalophus californianus
Location: Santa Barbara Island, California
Image ID: 23429
A great white shark swims through the clear waters of Isla Guadalupe, far offshore of the Pacific Coast of Mexico's Baja California. Guadalupe Island is host to a concentration of large great white sharks, which visit the island to feed on pinnipeds and use it as a staging area before journeying farther into the Pacific ocean.
Species: Great white shark, Carcharodon carcharias
Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico
Image ID: 19454
Radio telescope antenna, part of the Very Long Baseline Array (VLBA). The Very Long Baseline Array (VLBA) is a system of ten radio telescopes which are operated remotely from their Array Operations Center located in Socorro, New Mexico, as a part of the National Radio Astronomy Observatory (NRAO). These ten radio antennas work together as an array that forms the longest system in the world that uses very long baseline interferometry.
Location: Big Pine, California
Image ID: 28787
Lunar eclipse sequence. While the moon lies in the full shadow of the earth (umbra) it receives only faint, red-tinged light refracted through the Earth's atmosphere. As the moon passes into the penumbra it receives increasing amounts of direct sunlight, eventually leaving the shadow of the Earth altogether. October 8, 2014.
Image ID: 29411
Panorama dimensions: 8000 x 8000
A beautiful golden-brown female California Sea Lion at the Coronado Islands, Baja California, Mexico. The huge male bull that formed the harem of which she was a part allowed her to hang out with me for a while, even while he continued patrolling just over my head.
Species: California Sea Lion, Zalophus californianus
Location: Coronado Islands (Islas Coronado), Baja California, Mexico
Image ID: 37318
Blue whale underwater with mouth full of krill, calf is partially seen below the mother. This incredible picture of a blue whale, the largest animal ever to inhabit earth, shows it swimming through the open ocean, a rare underwater view. Over 80' long and just a few feet from the camera, an extremely wide lens was used to photograph the entire enormous whale.
Species: Blue whale, Balaenoptera musculus
Location: California
Image ID: 27317
Flama de la Amistad, a statue by Leonardo Nierman. Installed in the San Diego Convention Center’s outdoor amphitheater, Flame of Friendship is a polished, stainless-steel statue set against San Diego Bay weighing 3,700 pounds and standing 20 feet tall and eight feet wide.
Location: San Diego, California
Image ID: 26556
Belt of Venus over Horseshoe Bend on the Colorado River. The Colorado River makes a 180-degree turn at Horseshoe Bend. Here the river has eroded the Navajo sandstone for eons, digging a canyon 1100-feet deep. The Belt of Venus, or anti-twilight arch, is the shadow of the earth cast upon the atmosphere just above the horizon, and occurs a few minutes before sunrise or after sunset.
Location: Page, Arizona
Image ID: 37781
Panorama dimensions: 5719 x 8788
Courting pair of southern right whales underwater, Eubalaena australis. In this image, the male is below and inverted (belly up) and the female is at the surface. While the posture in this photo isn't quite mating, it is a courting behavior that often precedes mating.
Species: Southern Right Whale, Eubalaena australis
Location: Puerto Piramides, Chubut, Argentina
Image ID: 38295
Huge California Sea Lion Male Underwater, a bull, patrolling his breeding harem and territory, Coronado Islands, Mexico. His sagittal crest, the bony bump on his head that distinguishes adult male sea lions, is clearly seen. This particular sea lion bears an orange tag on his left foreflipper, probably as a result of rescue and release as a young sea lion years earlier.
Species: California sea lion, Zalophus californianus
Location: Coronado Islands (Islas Coronado), Baja California, Mexico
Image ID: 38652
Isla San Pedro Martir at sunset with extensive forest of Cardon Cactus seen on the summit ridge of the island, aerial photo, Sea of Cortez, Mexico. San Pedro Martir Island and its marine life are, since 2002, part of the San Pedro Martir Biosphere Reserve, and is regarded as a natural laboratory of adaptive evolution, similar to that of the Galapagos Islands. It is home to 292 species of fauna and flora (both land-based and aquatic), with 42 species protected by Mexican law, and 30 listed on the Red List of Threatened Species. San Pedro Martir is also unique in the area for its year-round quantity of birds. The island is the only island in the area with a perpetually swirling cloud of sea birds. This is because the water around the island, has some of the most successful marine productivity in the world.
Location: Isla San Pedro Martir, Sonora, Mexico
Image ID: 40397
California sea lions, underwater at Santa Barbara Island. Santa Barbara Island, 38 miles off the coast of southern California, is part of the Channel Islands National Marine Sanctuary and Channel Islands National Park. It is home to a large population of sea lions.
Species: California sea lion, Zalophus californianus
Location: Santa Barbara Island, California
Image ID: 23422
Blue whale, exhaling as it surfaces from a dive, aerial photo. The blue whale is the largest animal ever to have lived on Earth, exceeding 100' in length and 200 tons in weight.
Species: Blue whale, Balaenoptera musculus
Location: Redondo Beach, California
Image ID: 25953
Sky Rock at night, light by moonlight with stars in the clear night sky above. Sky Rock petroglyphs near Bishop, California. Hidden atop an enormous boulder in the Volcanic Tablelands lies Sky Rock, a set of petroglyphs that face the sky. These superb examples of native American petroglyph artwork are thought to be Paiute in origin, but little is known about them.
Image ID: 28505
Aerial photo of the San Rafael Reef at dawn. A fold in the Earth's crust leads to this inclined section of the San Rafael Reef, at the eastern edge of the San Rafael Swell. Clearly seen are the characteristic triangular flatiron erosion patterns that typical this formation. The colors seen here arise primarily from Navajo and Wingate sandstone.
Location: Utah
Image ID: 39784
Rattlesnake Canyon, a beautiful slot canyon that is part of the larger Antelope Canyon system. Page, Arizona.
Location: Navajo Tribal Lands, Page, Arizona
Image ID: 36039
Belt of Venus over Grand Canyon at sunrise, viewed from Hopi Point on the south rim of Grand Canyon National Park. The Belt of Venus, or anti-twilight arch, is the shadow of the earth cast upon the atmosphere just above the horizon, and occurs a few minutes before sunrise or after sunset.
Location: Grand Canyon National Park, Arizona
Image ID: 37765
Panorama dimensions: 5409 x 10272