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: Madison River, Yellowstone National Park, Wyoming
Image ID: 19697
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
Blue whale and San Onofre Nuclear Power generating station, raising fluke prior to diving for food, fluking up, lifting its tail as it swims in the open ocean foraging for food.
Species: Blue whale, Balaenoptera musculus
Location: Dana Point, California
Image ID: 27337
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
A blue whale eating krill. This blue whale is seen feeding and surfacing amid krill with its throat fully engorged with krill and water. It will push the water back out with its tongue, trapping the krill in its baleen which acts like a filter. Aerial photo, Baja California.
Species: Blue whale, Balaenoptera musculus
Image ID: 05837
Aerial photo of blue whale near San Diego as it swims on its side turning and blows a bubble of air out of its blowhole. This enormous blue whale glides at the surface of the ocean, resting and breathing before it dives to feed on subsurface krill.
Species: Blue whale, Balaenoptera musculus
Location: San Diego, California
Image ID: 39427
Aerial photo of blue whale near San Diego. This enormous blue whale glides at the surface of the ocean, resting and breathing before it dives to feed on subsurface krill.
Species: Blue whale, Balaenoptera musculus
Location: San Diego, California
Image ID: 39428
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
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
Blue whale, exhaling in a huge blow as it swims at the surface between deep dives. The blue whale's blow is a combination of water spray from around its blowhole and condensation from its warm breath.
Species: Blue whale, Balaenoptera musculus
Location: La Jolla, California
Image ID: 21253
Blue whale, exhaling in a huge blow as it swims at the surface between deep dives. The blue whale's blow is a combination of water spray from around its blowhole and condensation from its warm breath.
Species: Blue whale, Balaenoptera musculus
Location: San Diego, California
Image ID: 34560
Blue whale, exhaling in a huge blow as it swims at the surface between deep dives. The blue whale's blow is a combination of water spray from around its blowhole and condensation from its warm breath.
Species: Blue whale, Balaenoptera musculus
Location: San Diego, California
Image ID: 34564
Aerial photo of blue whale near San Diego. This enormous blue whale glides at the surface of the ocean, resting and breathing before it dives to feed on subsurface krill.
Species: Blue whale, Balaenoptera musculus
Location: San Diego, California
Image ID: 40611
Full Moon Rising over Hotel del Coronado, known affectionately as the Hotel Del. It was once the largest hotel in the world, and is one of the few remaining wooden Victorian beach resorts. It sits on the beach on Coronado Island, seen here with downtown San Diego in the distance. It is widely considered to be one of Americas most beautiful and classic hotels. Built in 1888, it was designated a National Historic Landmark in 1977.
Location: San Diego, California
Image ID: 29420
Brown pelican, golden sunrise light, winter adult breeding plumage, showing bright red gular pouch and dark brown hindneck plumage of breeding adults. This large seabird has a wingspan over 7 feet wide. The California race of the brown pelican holds endangered species status, due largely to predation in the early 1900s and to decades of poor reproduction caused by DDT poisoning.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 23624
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