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Giant redwood, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements. Size Photo. Image ID: 25795 Species: Coast redwood, giant redwood, California redwood, Sequoia sempervirens Location: Redwood National Park, California, USA	Black bear cub in a tree. Mother bears will often send their cubs up into the safety of a tree if larger bears (who might seek to injure the cubs) are nearby. Black bears have sharp claws and, in spite of their size, are expert tree climbers. Size Picture. Image ID: 18746 Species: American black bear, Ursus americanus Location: Orr, Minnesota, USA	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. Stock Photography of Size. Image ID: 19721 Species: Elk, Cervus canadensis Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA

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. Photograph of Size. Image ID: 25890 Species: Roosevelt elk, Cervus canadensis roosevelti Location: Redwood National Park, California, USA	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. Size Photos. Image ID: 25878 Species: Roosevelt elk, Cervus canadensis roosevelti Location: Redwood National Park, California, USA	A bull elephant seal forceably mates (copulates) with a much smaller female, often biting her into submission and using his weight to keep her from fleeing. Males may up to 5000 lbs, triple the size of females. Sandy beach rookery, winter, Central California Size Image. Image ID: 35133 Location: Piedras Blancas, San Simeon, California, USA

A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Professional stock photos of Size. Image ID: 19468 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico	A bull elephant seal forceably mates (copulates) with a much smaller female, often biting her into submission and using his weight to keep her from fleeing. Males may up to 5000 lbs, triple the size of females. Sandy beach rookery, winter, Central California. Pictures of Size. Image ID: 20388 Species: Elephant seal, Mirounga angustirostris Location: Piedras Blancas, San Simeon, California, USA	A bull elephant seal forceably mates (copulates) with a much smaller female, often biting her into submission and using his weight to keep her from fleeing. Males may up to 5000 lbs, triple the size of females. Sandy beach rookery, winter, Central California Size Photo. Image ID: 35132 Location: Piedras Blancas, San Simeon, California, USA

A bull elephant seal forceably mates (copulates) with a much smaller female, often biting her into submission and using his weight to keep her from fleeing. Males may up to 5000 lbs, triple the size of females. Sandy beach rookery, winter, Central California. Size Picture. Image ID: 15408 Species: Elephant seal, Mirounga angustirostris Location: Piedras Blancas, San Simeon, California, USA	A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Stock Photography of Size. Image ID: 19455 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico	A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Photograph of Size. Image ID: 19456 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico

A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Size Photos. Image ID: 19458 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico	A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Size Image. Image ID: 19459 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico	A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Professional stock photos of Size. Image ID: 19460 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico

A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Pictures of Size. Image ID: 19463 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico	A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Size Photo. Image ID: 19464 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico	A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Size Picture. Image ID: 19467 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico

A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Stock Photography of Size. Image ID: 19471 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico	A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Photograph of Size. Image ID: 19474 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico	A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Size Photos. Image ID: 19481 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico

Ferns grow below coastal redwood and Douglas Fir trees, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements. Size Image. Image ID: 25796 Species: Coast redwood, giant redwood, California redwood, Sequoia sempervirens Location: Redwood National Park, California, USA	Ferns grow below coastal redwood and Douglas Fir trees, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements. Professional stock photos of Size. Image ID: 25798 Species: Coast redwood, giant redwood, California redwood, Sequoia sempervirens Location: Redwood National Park, California, USA	Giant redwood, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements. Pictures of Size. Image ID: 25799 Species: Coast redwood, giant redwood, California redwood, Sequoia sempervirens Location: Redwood National Park, California, USA

Commemoration plaque in Lady Bird Johnson Grove, marking the place where President Richard Nixon dedicated this coastal redwood grove to Lady Bird Johnson, an environmental activist and former first lady. Size Photo. Image ID: 25808 Species: Coast redwood, giant redwood, California redwood, Sequoia sempervirens Location: Redwood National Park, California, USA	Gentoo penguin coming ashore, after foraging at sea, walking through ocean water as it wades onto a sand beach. Adult gentoo penguins grow to be 30" and 19lb in size. They feed on fish and crustaceans. Gentoo penguins reside in colonies well inland from the ocean, often formed of a circular collection of stones gathered by the penguins. Size Picture. Image ID: 23828 Species: Gentoo penguin, Pygoscelis papua Location: New Island, Falkland Islands, United Kingdom	Great white shark, research identification photograph. A great white shark is countershaded, with a dark gray dorsal color and light gray to white underside, making it more difficult for the shark's prey to see it as approaches from above or below in the water column. The particular undulations of the countershading line along its side, where gray meets white, is unique to each shark and helps researchers to identify individual sharks in capture-recapture studies. Guadalupe Island is host to a relatively large population of great white sharks who, through a history of video and photographs showing their countershading lines, are the subject of an ongoing study of shark behaviour, migration and population size. Stock Photography of Size. Image ID: 28768 Species: Great white shark, Carcharodon carcharias Location: Guadalupe Island (Isla Guadalupe), Baja California, Mexico

Black-browed albatross in flight, at sea. The black-browed albatross is a medium-sized seabird at 31-37" long with a 79-94" wingspan and an average weight of 6.4-10 lb. They have a natural lifespan exceeding 70 years. They breed on remote oceanic islands and are circumpolar, ranging throughout the Southern Oceanic Photograph of Size. Image ID: 23962 Species: Black-browed albatross, Thalassarche melanophrys Location: Falkland Islands, United Kingdom	Gentoo penguins coming ashore, after foraging at sea, walking through ocean water as it wades onto a sand beach. Adult gentoo penguins grow to be 30" and 19lb in size. They feed on fish and crustaceans. Gentoo penguins reside in colonies well inland from the ocean, often formed of a circular collection of stones gathered by the penguins. Size Photos. Image ID: 23833 Species: Gentoo penguin, Pygoscelis papua Location: New Island, Falkland Islands, United Kingdom	A walking path through Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements. Size Image. Image ID: 25797 Species: Coast redwood, giant redwood, California redwood, Sequoia sempervirens Location: Redwood National Park, California, USA