Dandelion (Taraxacum officinale) seedhead Water boiling in pan Mountain Lion or Cougar mother with kitten, North America, captive animal Snowy Owl adult perching on a low stump in a field of green grass, British Columbia American Bison (Bison bison) portrait in snow, North America Colorado River from Toroweap Overlook, Grand Canyon National Park, Arizona Mexican Golden Poppy (Eschscholzia glyptosperma) detail, New Mexico Mormon Row Barn, Grand Teton National Park, Wyoming Little Stony Creek flowing through Jefferson National Forest, Virginia Observation Peak and coniferous forest reflected in pond, Banff National Park, Alberta Playa Carillo, Guanacaste, Costa Rica El Arco and sea stacks, Cabo San Lucas, Mexico Startrails over Shiprock in the four corners region of the Southwest, New Mexico Birch forest, Pictured Rocks National Lakeshore, Michigan Easely Peak, Sawtooth National Recreation Area, Idaho Kirk Creek Beach, Big Sur, California Sandstone mountains, Palo Duro Canyon State Park, Texas Cruise ship near glacier, Alaska Black Bear (Ursus americanus) portrait, North America Red Poppy field, Europe Mountain Lion or Cougar walking through a field of red Paintbrush flowers South Rim of Grand Canyon with a dusting of snow, Grand Canyon National Park, Arizona Appalachian Mountains ablaze with fall color, Great Smoky Mountains National Park Arch Rock and moon, Valley of Fire State Park, Nevada California Poppy and Desert Bluebells carpeting a spring hillside, California Rolling fog on Clingman's Dome, Great Smoky Mountains National Park, Tennessee Sand Verbena and Desert Sunflowers, Anza-Borrego Desert State Park, California Sandstone striations and erosional features, Badlands National Park, South Dakota Redhead Duck (Aythya americana) male with reflection near reeds, Washington Sand Creek cascades in Osage Hills State Park, Oklahoma Greater Flamingo (Phoenicopterus ruber), Jurong Bird Park, Singapore Aspen (Populus tremuloides) forest in spring, Gunnison National Forest, Colorado Cathedral Rock reflected in Oak Creek, Red Rock State Park near Sedona, Arizona Dandelion seed being dispersed by wind, Oregon Reticulated Giraffe portrait, native to Africa Peregrine Falcon adult in protective stance standing on downed duck, North America Beach at Kirk Creek Beach, Big Sur, California Double-crested Cormorant (Phalacrocorax auritus) stretching its wings, North America Grand Teton Range at Schwabacher Landing, Grand Teton National Park, Wyoming Gothic Mountain and Beaver Lodge, near Crested Butte, Colorado Beach and coastline, Manuel Antonio National Park, Costa Rica Mammoth Peak, Upper Dana Meadow, Yosemite National Park, California Bristlecone Pine tree overlooking forest, Rocky Mountain National Park, Colorado Garrapata Creek flowing into the Pacific Ocean, Big Sur, California Timber Wolf (Canis lupus) leaping over fallen log, North America Appalachian Mountains from Doughton Park, Blue Ridge Parkway, North Carolina California Poppy and other wildflowers, Antelope Valley, California Beach at dusk, Blowing Rocks Preserve, Florida Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51