Jim Brandenburg / Black Spruce (Picea mariana) forest, Minnesota

Norbert Wu / Breaking wave, Carmel Beach, California

Jeff Foott / Small waterfall, Zion National Park, Utah

Jeff Foott / Gambel Oak (Quercus gambelii) leaves, Zion National Park, Utah

Jeff Foott / Cottonwood (Populus sp) tree in winter, Zion National Park, Utah

Scott Leslie / Cabbage Palm (Sabal palmetto) trees at sunrise, Kissimmee Prairie Preserve State Park, Florida

Scott Leslie / Canoeists at dawn, Everglades National Park, Florida

Sumio Harada / Mountain Goat (Oreamnos americanus) kid browsing on vegetation, Glacier National Park, Montana

Tim Fitzharris / Seastacks silhouetted at sunset, Ruby Beach, Olympic National Park, Washington

Richard Herrmann / Giant Kelp (Macrocystis pyrifera) blades floating at surface, Cortez Bank, California

Sebastian Kennerknecht / Barley (Hordeum sp) field, South Dakota

Murray Cooper / Coast Redwood (Sequoia sempervirens) forest in morning mist, Humboldt Redwoods State Park, California

Sebastian Kennerknecht / Pride of Madeira (Echium candicans) flowering, Big Sur, California

Yva Momatiuk & John Eastcott / Snow Goose (Chen caerulescens) and Sandhill Cranes (Grus canadensis) feeding and roosting in pond seeking protection from predators at sunset, Bosque del Apache National Wildlife Refuge, New Mexico

Michael Quinton / Red Fox (Vulpes vulpes) pup, Alaska

Michael Quinton / Red Fox (Vulpes vulpes) pup, Alaska

Jasper Doest / Coast Live Oak (Quercus agrifolia), Texas

Jasper Doest / Coast Live Oak (Quercus agrifolia), Texas

Norbert Wu / Monterey Cypress (Cupressus macrocarpa) tree, the famous landmark at Pebble Beach in winter, Monterey, California

Sebastian Kennerknecht / Lotus Lily (Nelumbo sp) leaves in pond, Waimea Valley, Oahu, Hawaii

Tim Fitzharris / Mount Rainier from Sunrise Point, Mount Rainier National Park, Washington

Norbert Wu / Rays of the setting sun shining through a redwood forest near Brookings, Oregon

Norbert Wu / Rays of the setting suns shining through a redwood forest near Brookings, Oregon

Pete Oxford / Lodgepole Pine (Larix laricina) forest with dead trees caused by flood, Yellowstone National Park, Wyoming

Pete Oxford / Lodgepole Pine (Larix laricina) forest with dead trees caused by flood, Yellowstone National Park, Wyoming

Michio Hoshino / Temperate rainforest interior, Olympic National Park, Washington

Jaymi Heimbuch / Coast Redwood (Sequoia sempervirens) needles, Butano State Park, California

Jeff Foott / Lupine (Lupinus sp) flowers at sunset in spring, Redwood National Park, California

Jaymi Heimbuch / Sunlight filtering through trees onto ferns in forest, Russian River, California

Benjamin Olson / Bighorn Sheep (Ovis canadensis) lambs, Badlands National Park, South Dakota

Benjamin Olson / Purple Loosestrife (Lythrum salicaria), invasive plant flowering in lake, Lebanon Hills Regional Park, Minnesota

Yva Momatiuk & John Eastcott / Giant Elephant Ear (Colocasia gigantea) leaf, Denver Botanic Gardens, Denver, Colorado

Yva Momatiuk & John Eastcott / Giant Elephant Ear (Colocasia gigantea) leaf, Denver Botanic Gardens, Denver, Colorado

Scott Leslie / Cabbage Palm (Sabal palmetto) trees at sunrise, Kissimmee Prairie Preserve State Park, Florida

Donald M. Jones / Snow Goose (Chen caerulescens) flock flying, Fairfield, Montana

Sebastian Kennerknecht / Power plant and powerlines, Moss Landing, Monterey Bay, California

Jasper Doest / Coast Live Oak (Quercus agrifolia), Texas

Jasper Doest / Coast Live Oak (Quercus agrifolia) at sunset, George West, Texas

Jasper Doest / Coast Live Oak (Quercus agrifolia) at sunset, George West, Texas

Jeff Foott / Small Camas (Camassia quamash) flowering in meadow, Yellowstone National Park, Wyoming

Jeff Foott / Geyser erupting at sunset, Old Faithful, Yellowstone National Park, Wyoming

Jeff Foott / Cottonwood (Populus sp) covered with snow in winter, Zion National Park, Utah

Jeff Foott / Coniferous trees at sunrise, Valley, Yosemite National Park, California

Jeff Foott / Geyser erupting, Beehive Geyser, Yellowstone National Park, Wyoming