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
Australian Sea Lion Underwater, Grindal Island. Australian sea lions are the only endemic pinniped in Australia, and are found along the coastlines and islands of south and west Australia.
Species: Australian Sea Lion, Neophoca cinearea
Location: Grindal Island, South Australia
Image ID: 39155
Scalloped hammerhead shark swims over a reef in the Galapagos Islands. The hammerheads eyes and other sensor organs are placed far apart on its wide head to give the shark greater ability to sense the location of prey.
Species: Scalloped hammerhead shark, Sphyrna lewini
Location: Wolf Island, Galapagos Islands, Ecuador
Image ID: 16246
Australian Sea Lion Underwater, Grindal Island. Australian sea lions are the only endemic pinniped in Australia, and are found along the coastlines and islands of south and west Australia.
Species: Australian Sea Lion, Neophoca cinearea
Location: Grindal Island, South Australia
Image ID: 39156
Australian Sea Lions in Kelp, Grindal Island. Australian sea lions are the only endemic pinniped in Australia, and are found along the coastlines and islands of south and west Australia.
Species: Australian Sea Lion, Neophoca cinearea
Location: Grindal Island, South Australia
Image ID: 39163
Australian Sea Lion Underwater, Grindal Island. Australian sea lions are the only endemic pinniped in Australia, and are found along the coastlines and islands of south and west Australia.
Species: Australian Sea Lion, Neophoca cinearea
Location: Grindal Island, South Australia
Image ID: 39164