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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.
Image ID: 19693
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA | Vernal Falls at peak flow in late spring, with a rainbow appearing in the spray of the falls, viewed from the Mist Trail.
Image ID: 12634
Location: Vernal Falls, Yosemite National Park, California, USA | A Florida manatee, or West Indian Manatee, swims slowly through the clear waters of Crystal River.
Image ID: 02696
Species: West Indian manatee, Trichechus manatus
Location: Three Sisters Springs, Crystal River, Florida, USA |
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Sol Duc Falls. Sol Duc Falls is one of the largest and most beautiful waterfalls in Olympic National Park, seen here from a bridge that crosses the canyon just below the falls. Surrounding the falls is an old-growth forest of hemlocks and douglas firs, some of which are three hundred years in age.
Image ID: 13747
Location: Sol Duc Springs, Olympic National Park, Washington, USA | Upper Yosemite Falls near peak flow in spring. Yosemite Falls, at 2425 feet tall (730m) is the tallest waterfall in North America and fifth tallest in the world. Yosemite Valley.
Image ID: 16066
Location: Yosemite Falls, Yosemite National Park, California, USA | Brown bear female sow in sedge meadow, with her three spring cubs hidden by the deep grass next to her. These cubs were born earlier in the spring and will remain with their mother for almost two years, relying on her completely for their survival.
Image ID: 19154
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA |
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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.
Image ID: 19698
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA | Two Florida manatees, or West Indian Manatees, swim together in the clear waters of Crystal River. Florida manatees are endangered.
Image ID: 02628
Species: West Indian manatee, Trichechus manatus
Location: Three Sisters Springs, Crystal River, Florida, USA | Two Florida manatees, or West Indian Manatees, swim together in the clear waters of Crystal River. Florida manatees are endangered.
Image ID: 02629
Species: West Indian manatee, Trichechus manatus
Location: Three Sisters Springs, Crystal River, Florida, USA |
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A Florida manatee, or West Indian Manatee, hovers in the clear waters of Crystal River.
Image ID: 02653
Species: West Indian manatee, Trichechus manatus
Location: Three Sisters Springs, Crystal River, Florida, USA | A Florida manatee, or West Indian Manatee, hovers in the clear waters of Crystal River.
Image ID: 02654
Species: West Indian manatee, Trichechus manatus
Location: Three Sisters Springs, Crystal River, Florida, USA | Three Sisters Springs depicted in an underwater landscape with sand, clear water and trees.
Image ID: 02673
Location: Three Sisters Springs, Crystal River, Florida, USA |
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Mangrove snapper schooling in the clear waters of Crystal River, with trees in the background.
Image ID: 02688
Species: Mangrove snapper, Lutjanus griseus
Location: Three Sisters Springs, Crystal River, Florida, USA | Darwin Falls in Death Valley, near the settlement of Panamint Springs. The falls are fed by a perennial stream that flows through a narrow canyon of plutonic rock, and drop of total of 80' (24m) in two sections.
Image ID: 27683
Location: Death Valley National Park, California, USA | Brown bear female sow with spring cubs. These three cubs were born earlier in the spring and will remain with their mother for almost two years, relying on her completely for their survival.
Image ID: 19181
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA |
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Arizona lupine is a common early spring ephemeral wildflower of the Colorado Desert. The purple-pink flowers show a yellow spot on the upper petal, which changes in color to red once the flower has been pollinated to discourage insects from visiting it after pollination.
Image ID: 35174
Location: Anza-Borrego Desert State Park, Borrego Springs, California, USA | Desert agave, also known as the Century Plant, blooms in spring in Anza-Borrego Desert State Park. Desert agave is the only agave species to be found on the rocky slopes and flats bordering the Coachella Valley. It occurs over a wide range of elevations from 500 to over 4,000. It is called century plant in reference to the amount of time it takes it to bloom. This can be anywhere from 5 to 20 years. They send up towering flower stalks that can approach 15 feet in height. Sending up this tremendous display attracts a variety of pollinators including bats, hummingbirds, bees, moths and other insects and nectar-eating birds.
Image ID: 11550
Species: Desert agave, Agave deserti | Fern Springs, a small natural spring in Yosemite Valley near the Pohono Bridge, trickles quietly over rocks as it flows into the Merced River.
Image ID: 12650
Location: Fern Springs, Yosemite National Park, California, USA |
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Morning Glory Pool has long been considered a must-see site in Yellowstone. At one time a road brought visitors to its brink. Over the years they threw coins, bottles and trash in the pool, reducing its flow and causing the red and orange bacteria to creep in from its edge, replacing the blue bacteria that thrive in the hotter water at the center of the pool. The pool is now accessed only by a foot path. Upper Geyser Basin.
Image ID: 13352
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Castle Geyser erupts with the colorful bacteria mats of Tortoise Shell Spring in the foreground. Castle Geyser reaches 60 to 90 feet in height and lasts 20 minutes. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin.
Image ID: 13426
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming, USA | Orange Spring Mound. Many years of mineral deposition has built up Orange Spring Mound, part of the Mammoth Hot Springs complex.
Image ID: 13614
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA |
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Sol Duc Falls. Sol Duc Falls is one of the largest and most beautiful waterfalls in Olympic National Park, seen here from a bridge that crosses the canyon just below the falls. Surrounding the falls is an old-growth forest of hemlocks and douglas firs, some of which are three hundred years in age.
Image ID: 13748
Location: Sol Duc Springs, Olympic National Park, Washington, USA | Upper Yosemite Falls near peak flow in spring. Yosemite Falls, at 2425 feet tall (730m) is the tallest waterfall in North America and fifth tallest in the world. Yosemite Valley.
Image ID: 16068
Location: Yosemite Falls, Yosemite National Park, California, USA | Fern Springs, a small natural spring in Yosemite Valley near the Pohono Bridge, trickles quietly over rocks as it flows into the Merced River. Yosemite Valley.
Image ID: 16084
Location: Fern Springs, Yosemite National Park, California, USA |
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Brown bear spring cub, just a few months old.
Image ID: 17056
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska, USA | Brown bear female sow in sedge meadow, with her three spring cubs hidden by the deep grass next to her. These cubs were born earlier in the spring and will remain with their mother for almost two years, relying on her completely for their survival.
Image ID: 19186
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Brown bear female sow with spring cubs. These three cubs were born earlier in the spring and will remain with their mother for almost two years, relying on her completely for their survival.
Image ID: 19205
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA |
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Brown bear female sow with spring cubs. These three cubs were born earlier in the spring and will remain with their mother for almost two years, relying on her completely for their survival.
Image ID: 19206
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Brown bear female sow with spring cubs. These cubs were born earlier in the spring and will remain with their mother for almost two years, relying on her completely for their survival.
Image ID: 19211
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Brown bear female sow in sedge meadow, with her three spring cubs hidden by the deep grass next to her. These cubs were born earlier in the spring and will remain with their mother for almost two years, relying on her completely for their survival.
Image ID: 19219
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA |
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