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
Venus comb murex. Scientists speculate that the distinctively long and narrow spines are a protection against fish and other mollusks and prevent the mollusk from sinking into the soft, sandy mud where it is commonly found.
Species: Venus comb murex, Murex pecten
Image ID: 12970
Ocean sunfish recruiting fish near drift kelp to clean parasites, open ocean, Baja California.
Species: Ocean sunfish, Mola mola
Image ID: 03267
Humpback whales surface together during coordinated bubble-net feeding in Southeast Alaska. The whales use bubbles, sound, and movement to corral fish before capturing them in their open mouths.
Species: Humpback whale, Megaptera novaeangliae
Location: Sitka Sound, Alaska
Image ID: 41587
Humpback whales surface together during coordinated bubble-net feeding in Southeast Alaska. The whales use bubbles, sound, and movement to corral fish before capturing them in their open mouths.
Species: Humpback whale, Megaptera novaeangliae
Location: Sitka Sound, Alaska
Image ID: 41583
Blue whale underwater photo showing entire whale head (rostrum) to tail (fluke). This picture of a blue whale shows it swimming through the open ocean, a rare underwater view. Specialized underwater camera gear, including an extremely wide lens, was used to capture the entire enormous whale in a single photograph.
Species: Blue whale, Balaenoptera musculus
Location: California
Image ID: 27300
Humpback whale surfaces during coordinated bubble-net feeding in Southeast Alaska. The whales use bubbles, sound, and movement to corral fish before capturing them in their open mouths.
Species: Humpback whale, Megaptera novaeangliae
Location: Sitka Sound, Alaska
Image ID: 41582
Panorama dimensions: 5699 x 8548
Humpback whales surface together during coordinated bubble-net feeding in Southeast Alaska. The whales use bubbles, sound, and movement to corral fish before capturing them in their open mouths.
Species: Humpback whale, Megaptera novaeangliae
Location: Sitka Sound, Alaska
Image ID: 41580
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