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
The Wave at Night, under a clear night sky full of stars. Photographer is illuminating the striated rocks with a small handheld light. The Wave, an area of fantastic eroded sandstone featuring beautiful swirls, wild colors, countless striations, and bizarre shapes set amidst the dramatic surrounding North Coyote Buttes of Arizona and Utah. The sandstone formations of the North Coyote Buttes, including the Wave, date from the Jurassic period. Managed by the Bureau of Land Management, the Wave is located in the Paria Canyon-Vermilion Cliffs Wilderness and is accessible on foot by permit only.
Location: North Coyote Buttes, Paria Canyon-Vermilion Cliffs Wilderness, Arizona
Image ID: 28620
Milky Way and stars over Crater Lake at night. Panorama of Crater Lake and Wizard Island at night, Crater Lake National Park.
Location: Crater Lake National Park, Oregon
Image ID: 28641
Panorama dimensions: 7650 x 13389
Full Moon Rises over the San Diego City Skyline and Mount Laguna, viewed from Point Loma, panoramic photograph.
Location: San Diego, California
Image ID: 36634
Panorama dimensions: 5276 x 16167
Blue whales feeding on krill underwater closeup photo. A picture of a blue whale with its throat pleats inflated with a mouthful of krill. A calf swims behind and below the adult. 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
Image ID: 27314